20141125_KUAS_VisualC++_FinalClasswork

/**************************************/
/** 20141125 Final Classwork         **/
/** Maker  : Yan                     **/
/** E-Mail : yanchangx0924@gmail.com **/
/** Date   : 2014/11/25 am.00:00     **/
/**************************************/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>

struct MyMember
{
    char userID[15];
    char name[15];
    char username[15];
    char password[15];
    char phone[15];
    char address[15];
    char birthday[15];
    char Email[1000];
    int DiscountCoupon1; //10%-Off
    int DiscountCoupon2; //15%-Off
};

struct MyMerchandise
{
    int uniform_numbers;
    char name[7];
    int price;
    char firm[4];
    int stock;
};

int now_member_counter = -1;
int _signIn()
{
    system("cls");
    printf("**** Sign In ****\n");
    printf("Username: ");
    char username[20] = {NULL};
    scanf("%s", username);

    printf("Password: ");
    char password[20] = {NULL};
    scanf("%s", password);

    struct MyMember all_member[100];
    FILE *fptr_ReadMember = fopen("MembersData.txt", "r");
    if(fptr_ReadMember == NULL)
    {
        printf("    ---- Error Member Read ----\n");
        exit(EXIT_SUCCESS);
    }

    int counter = 0;
    while(!feof(fptr_ReadMember))
    {
        fscanf(fptr_ReadMember, "%s %s %s %s %s %s %s %s %d %d\n", all_member[counter].userID, all_member[counter].name, all_member[counter].username, \
                                                                   all_member[counter].password, all_member[counter].phone, all_member[counter].address, \
                                                                   all_member[counter].birthday, all_member[counter].Email, &all_member[counter].DiscountCoupon1, \
                                                                   &all_member[counter].DiscountCoupon2);
        counter++;
    }
    fclose(fptr_ReadMember);

    now_member_counter = -1;
    int _get = 0; //暫存登入狀態
    for(int i = 0; i < counter; i++)
    {
        if(strcmp(username, all_member[i].username) == 0)
        {
            if(strcmp(password, all_member[i].password) == 0)
            {
                if(i == 0)
                    _get = 3;
                else
                    _get = 2;
                now_member_counter = i;
            }
            else
                _get = 1;
            break;
        }
    }

    int login_state = 0;
    switch(_get)
    {
        case 0:
            printf("    ---- Do Not Have This Member ----\n");
            return 0;
            /*login_state = _signIn();*/
            break;

        case 1:
            printf("    ---- Password ERROR ----\n");
            return 0;
            /*login_state = _signIn();*/
            break;

        case 2:
            printf("    ---- Member Login Successfully ----\n");
            login_state = 2;
            break;

        case 3:
            printf("    ---- Administrator Login Successfully ----\n");
            login_state = 1;
            break;
    }
    return login_state;
}

int _signUp()
{
    struct MyMember all_member[100];
    FILE *fptr_ReadMember = fopen("MembersData.txt", "r");
    if(fptr_ReadMember == NULL)
    {
        printf("    ---- Error Member Read ----\n");
        exit(EXIT_SUCCESS);
    }

    int counter = 0;
    while(!feof(fptr_ReadMember))
    {
        fscanf(fptr_ReadMember, "%s %s %s %s %s %s %s %s %d %d\n", all_member[counter].userID, all_member[counter].name, all_member[counter].username, \
                                                                   all_member[counter].password, all_member[counter].phone, all_member[counter].address, \
                                                                   all_member[counter].birthday, all_member[counter].Email, &all_member[counter].DiscountCoupon1, \
                                                                   &all_member[counter].DiscountCoupon2);
        counter++;
    }
    fclose(fptr_ReadMember);

    system("cls");
    printf("**** Sign Up ****\n");
    struct MyMember add_new_member;
    printf("Enter your [ID_Number]: ");
    scanf("%s", add_new_member.userID);
    int userID_exist = 0;
    for(int i = 0; i < counter; i++)
        if(strcmp(add_new_member.userID, all_member[i].userID) == 0)
        {
            userID_exist = 1;
            break;
        }
    if(userID_exist == 1)
    {
        printf("    ---- Have The Same ID_Number, Please Check It Again ----\n");
        /*_signUp();*/
        return 0;
    }
    else
    {
        printf("Enter your [Name]: ");
        scanf("%s", add_new_member.name);

        printf("Enter your [Username]: ");
        scanf("%s", add_new_member.username);
        int username_exist = 0;
        for(int i = 0; i < counter; i++)
            if(strcmp(add_new_member.username, all_member[i].username) == 0)
            {
                username_exist = 1;
                break;
            }
        if(username_exist == 1)
        {
            printf("    ---- Have The Same Username, Please Change It ----\n");
            /*_signUp();*/
            return 0;
        }
        else
        {
            printf("Enter your [Password]: ");
            scanf("%s", add_new_member.password);

            printf("Enter your [Phone]: ");
            scanf("%s", add_new_member.phone);

            printf("Enter your [Address]: ");
            scanf("%s", add_new_member.address);

            printf("Enter your [Birthday]: ");
            scanf("%s", add_new_member.birthday);

            printf("Enter your [Email]: ");
            scanf("%s", add_new_member.Email);

            add_new_member.DiscountCoupon1 = 0;
            add_new_member.DiscountCoupon2 = 0;

            all_member[counter] = add_new_member;
            counter++;

            FILE *fptr_WriteMember = fopen("MembersData.txt", "a");
            if(fptr_WriteMember == NULL)
            {
                printf("    ---- Error Member Write ----\n");
                exit(EXIT_SUCCESS);
            }
            else
            {
                fprintf(fptr_WriteMember,  "%s %s %s %s %s %s %s %s %d %d\n", add_new_member.userID, add_new_member.name, add_new_member.username, \
                                                                              add_new_member.password, add_new_member.phone, add_new_member.address, \
                                                                              add_new_member.birthday, add_new_member.Email, add_new_member.DiscountCoupon1, \
                                                                              add_new_member.DiscountCoupon2);
                fclose(fptr_WriteMember);
                printf("    ---- Account [%s] Sign Up Successfully ----\n", add_new_member.username);
            }
        }
    }

    return 0;
}

void watch_all_merchandise_information()
{
    system("cls");
    printf("**** (Administrator) Watch All Merchandise's Information ****\n");

    struct MyMerchandise all_merchandise[100];
    FILE *fptr_ReadMerchandise = fopen("MerchandisesData.txt", "r");
    if(fptr_ReadMerchandise == NULL)
    {
        printf("    ---- Error Member Read ----\n");
        exit(EXIT_SUCCESS);
    }

    int counter = 0;
    while(!feof(fptr_ReadMerchandise))
    {
        fscanf(fptr_ReadMerchandise, "%d %s %d %s %d\n", &all_merchandise[counter].uniform_numbers, all_merchandise[counter].name, \
                                                         &all_merchandise[counter].price, all_merchandise[counter].firm, \
                                                         &all_merchandise[counter].stock);
        if((counter == 0) && ((all_merchandise[counter].firm[0] == NULL) || (all_merchandise[counter].firm[0] == '\0')))
        {
            printf("    ---- Do Not Have Any Merchandise's Informations ----\n");
            return;
        }
        counter++;
    }
    fclose(fptr_ReadMerchandise);

    printf("\n**** Data Table ****");
    printf("\nNums\tName\tPrice\tFirm\tStock\n");
    for(int i = 0; i < counter; i++)
        printf("%4d\t%s\t%4d\t%s\t%4d\n",all_merchandise[i].uniform_numbers, all_merchandise[i].name, \
                                         all_merchandise[i].price, all_merchandise[i].firm, \
                                         all_merchandise[i].stock);
    return;
}

void add_new_merchandise_information()
{
    system("cls");
    printf("**** (Administrator) Add A New Merchandise's Information ****\n");

    struct MyMerchandise all_merchandise[100];
    FILE *fptr_ReadMerchandise = fopen("MerchandisesData.txt", "r");
    if(fptr_ReadMerchandise == NULL)
    {
        printf("    ---- Error Member Read ----\n");
        exit(EXIT_SUCCESS);
    }

    int counter = 0;
    while(!feof(fptr_ReadMerchandise))
    {
        fscanf(fptr_ReadMerchandise, "%d %s %d %s %d\n", &all_merchandise[counter].uniform_numbers, all_merchandise[counter].name, \
                                                         &all_merchandise[counter].price, all_merchandise[counter].firm, \
                                                         &all_merchandise[counter].stock);
        if((counter == 0) && (all_merchandise[counter].firm[0] == NULL) || (all_merchandise[counter].firm[0] == '\0'))
            break;
        counter++;
    }
    fclose(fptr_ReadMerchandise);

    //Output Data Table
    watch_all_merchandise_information();

    printf("\n**** Add A New Merchandise's Information ****\n");
    struct MyMerchandise all_new_merchandise;
    all_new_merchandise.uniform_numbers = counter;
    printf("Enter new merchandise's [Name]: ");
    scanf("%s", all_new_merchandise.name);
    printf("Enter new merchandise's [Price]: ");
    scanf("%d", &all_new_merchandise.price);
    printf("Enter new merchandise's [Firm]: ");
    scanf("%s", all_new_merchandise.firm);
    printf("Enter new merchandise's [Stock]: ");
    scanf("%d", &all_new_merchandise.stock);

    //做商品檢查，檢查是否已有相同商品資訊（檔案名稱、廠商名稱）
    //若有則提示使用者使用功能2：修改商品資訊
    for(int i = 0; i < counter; i++)
        if((strcmp(all_new_merchandise.name, all_merchandise[i].name) == 0) && strcmp(all_new_merchandise.firm, all_merchandise[i].firm) == 0)
        {
            printf("    ---- New Merchandise's Information Added Failure\n");
            printf("         Have The Same Merchandise Information At Nums: %2d\n", i);
            printf("         Please Use [Update The Merchandise's Information (Mode 2)]\n");
            printf("         To Make A Modification                                     ----\n");
            return;
        }

    FILE *fptr_AddNewMerchandise = fopen("MerchandisesData.txt", "a");
    if(fptr_AddNewMerchandise == NULL)
    {
        printf("    ---- Error Merchandise Write ----\n");
        exit(EXIT_SUCCESS);
    }
    else
    {
        fprintf(fptr_AddNewMerchandise, "%d %s %d %s %d\n", all_new_merchandise.uniform_numbers, all_new_merchandise.name, \
                                                            all_new_merchandise.price, all_new_merchandise.firm, \
                                                            all_new_merchandise.stock);
        printf("    ---- New Merchandise's Information Added Successfully ----\n");
    }
    fclose(fptr_AddNewMerchandise);
    return;
}

int update_the_merchandise_information()
{
    system("cls");
    printf("**** (Administrator) Update The Merchandise's Information ****\n");

    struct MyMerchandise all_merchandise[100];
    FILE *fptr_ReadMerchandise = fopen("MerchandisesData.txt", "r");
    if(fptr_ReadMerchandise == NULL)
    {
        printf("    ---- Error Merchandise Read ----\n");
        exit(EXIT_SUCCESS);
    }

    int counter = 0;
    while(!feof(fptr_ReadMerchandise))
    {
        fscanf(fptr_ReadMerchandise, "%d %s %d %s %d\n", &all_merchandise[counter].uniform_numbers, all_merchandise[counter].name, \
                                                         &all_merchandise[counter].price, all_merchandise[counter].firm, \
                                                         &all_merchandise[counter].stock);
        if((counter == 0) && ((all_merchandise[counter].firm[0] == NULL) || (all_merchandise[counter].firm[0] == '\0')))
        {
            printf("    ---- Do Not Have Any Merchandise's Information ----\n");
            return 1;
        }
        counter++;
    }
    fclose(fptr_ReadMerchandise);

    //Output Data Table
    watch_all_merchandise_information();

    printf("\n**** Enter The Merchandise's Number Which You Want To Update\n");
    printf("     Enter -1 To Go Back Administrator Function Menu  ****\n");
    printf("Enter merchandise's number: ");
    int number = 0;
    scanf("%d", &number);
    if(number == -1)
        return 0;
    else if(number >= counter)
    {
        printf("    ---- Do Not Have This Merchandise's Number ----\n");
        return 1;
    }

    printf("\n**** Update Merchandise's Information ****\n");
    struct MyMerchandise update_merchandise;
    update_merchandise.uniform_numbers = all_merchandise[number].uniform_numbers;
    printf("Update merchandise's [Name]: ");
    scanf("%s", update_merchandise.name);
    printf("Update merchandise's [Price]: ");
    scanf("%d", &update_merchandise.price);
    printf("Update merchandise's [Firm]: ");
    scanf("%s", update_merchandise.firm);
    printf("Update merchandise's [Stock]: ");
    scanf("%d", &update_merchandise.stock);

    all_merchandise[number] = update_merchandise;
    FILE *fptr_WriteMerchandise = fopen("MerchandisesData.txt", "w");
    if(fptr_WriteMerchandise == NULL)
    {
        printf("    ---- Error Merchandise Write ----\n");
        exit(EXIT_SUCCESS);
    }
    else
    {
        for(int i = 0; i < counter; i++)
            fprintf(fptr_WriteMerchandise, "%d %s %d %s %d\n", all_merchandise[i].uniform_numbers, all_merchandise[i].name, \
                                                               all_merchandise[i].price, all_merchandise[i].firm, \
                                                               all_merchandise[i].stock);
        printf("    ---- Merchandise's Information Updated Successfully ----\n");
    }
    fclose(fptr_WriteMerchandise);
    return 2;
}

int delete_the_merchandise_informaion()
{
    system("cls");
    printf("**** (Administrator) Delete The Merchandise's Information ****\n");

    struct MyMerchandise all_merchandise[100];
    FILE *fptr_ReadMerchandise = fopen("MerchandisesData.txt", "r");
    if(fptr_ReadMerchandise == NULL)
    {
        printf("    ---- Error Merchandise Read ----\n");
        exit(EXIT_SUCCESS);
    }

    int counter = 0;
    while(!feof(fptr_ReadMerchandise))
    {
        fscanf(fptr_ReadMerchandise, "%d %s %d %s %d\n", &all_merchandise[counter].uniform_numbers, all_merchandise[counter].name, \
                                                         &all_merchandise[counter].price, all_merchandise[counter].firm, \
                                                         &all_merchandise[counter].stock);
        if((counter == 0) && ((all_merchandise[counter].firm[0] == NULL) || (all_merchandise[counter].firm[0] == '\0')))
        {
            printf("    ---- Do Not Have Any Merchandise's Information ----\n");
            return 1;
        }
        counter++;
    }
    fclose(fptr_ReadMerchandise);

    //Output Data Table
    watch_all_merchandise_information();

    printf("\n**** Enter The Merchandise's Number Which You Want To Delete\n");
    printf("     Enter -1 To Go Back Administrator Function Menu  ****\n");
    printf("Enter merchandise's number: ");
    int number = -1;
    scanf("%d", &number);
    if(number == -1)
        return 0;
    else if(number >= counter)
    {
        printf("    ---- Do Not Have This Merchandise's Number ----\n");
        return 1;
    }

    if(counter == 1)
    {
        //Clear Array
        memset(all_merchandise, 0, sizeof(all_merchandise));
        counter = 0;
    }

    for(int i = number; i < counter - 1; i++)
    {
        all_merchandise[i] = all_merchandise[i + 1];
        all_merchandise[i].uniform_numbers = i;
    }
    counter--;

    FILE *fptr_WriteMerchandise = fopen("MerchandisesData.txt", "w");
    if(fptr_WriteMerchandise == NULL)
    {
        printf("    ---- Error Merchandise Write ----\n");
        exit(EXIT_SUCCESS);
    }
    else
    {
        for(int i = 0; i < counter; i++)
            fprintf(fptr_WriteMerchandise, "%d %s %d %s %d\n", all_merchandise[i].uniform_numbers, all_merchandise[i].name, \
                                                               all_merchandise[i].price, all_merchandise[i].firm, \
                                                               all_merchandise[i].stock);
        printf("    ---- Merchandise's Information Deleted Successfully ----\n");
        fclose(fptr_WriteMerchandise);
    }
    return 2;
}

void watch_all_members_information()
{
    system("cls");
    printf("**** (Administrator) Watch All Members Informations ****\n");

    struct MyMember all_member[100];
    FILE *fptr_ReadMember = fopen("MembersData.txt", "r");
    if(fptr_ReadMember == NULL)
    {
        printf("    ---- Error Member Read ----\n");
        exit(EXIT_SUCCESS);
    }

    int counter = 0;
    while(!feof(fptr_ReadMember))
    {
        fscanf(fptr_ReadMember, "%s %s %s %s %s %s %s %s %d %d\n", all_member[counter].userID, all_member[counter].name, all_member[counter].username, \
                                                                   all_member[counter].password, all_member[counter].phone, all_member[counter].address, \
                                                                   all_member[counter].birthday, all_member[counter].Email, &all_member[counter].DiscountCoupon1, \
                                                                   &all_member[counter].DiscountCoupon2);
        counter++;
    }
    fclose(fptr_ReadMember);

    printf("\n**** Date Table ****\n");
    printf("Num\tID_Number\tusername\n");
    if(counter == 1)
    {
        printf("    ---- Only Have Administrator's Account ----\n");
        return;
    }
    else
        for(int i = 0; i < counter; i++)
            if(i == 0)
                continue;
            else
                if(strlen(all_member[i].userID) < 8)
                    printf("%d\t%s\t\t%s\n", i - 1, all_member[i].userID, all_member[i].username);
                else
                    printf("%d\t%s\t%s\n", i - 1, all_member[i].userID, all_member[i].username);
    return;
}

int delete_the_member_information()
{
    system("cls");
    printf("**** (Administrator) Delete The Member's Information ****\n");
    struct MyMember all_member[100];
    FILE *fptr_ReadMember = fopen("MembersData.txt", "r");
    if(fptr_ReadMember == NULL)
    {
        printf("    ---- Error Member Read ----\n");
        exit(EXIT_SUCCESS);
    }

    int counter = 0;
    while(!feof(fptr_ReadMember))
    {
        fscanf(fptr_ReadMember, "%s %s %s %s %s %s %s %s %d %d\n", all_member[counter].userID, all_member[counter].name, all_member[counter].username, \
                                                                   all_member[counter].password, all_member[counter].phone, all_member[counter].address, \
                                                                   all_member[counter].birthday, all_member[counter].Email, &all_member[counter].DiscountCoupon1, \
                                                                   &all_member[counter].DiscountCoupon2);
        counter++;
    }
    fclose(fptr_ReadMember);

    if(counter == 1)
    {
        printf("    ---- Do Not Have Any Member Information (Except Administrator) ----\n");
        return 0;
    }
    else if(counter > 1)
    {
        watch_all_members_information();
        printf("\n**** Enter The Member's Number Which You Want To Delete\n");
        printf("     Enter -1 To Go Back Administrator Function Menu    ****\n");
        printf("Enter member's number: ");
        int number = -1;
        scanf("%d", &number);
        if(number == -1)
            return 0;
        else
            number++; //補償顯示時減去的1

        if(number == 0)
        {
            printf("    ---- Administrator Account Can Not Delete ----\n");
            return 1;
        }
        else if(number >= counter)
        {
            printf("    ---- Do Not Have This Member's Number ----\n");
            return 1;
        }

        for(int i = number; i < counter - 1; i++)
            all_member[i] = all_member[i + 1];
        counter--;

        FILE *fptr_WriteMember = fopen("MembersData.txt", "w");
        for(int i = 0; i < counter; i++)
            fprintf(fptr_WriteMember,  "%s %s %s %s %s %s %s %s %d %d\n", all_member[i].userID, all_member[i].name, all_member[i].username, \
                                                                          all_member[i].password, all_member[i].phone, all_member[i].address, \
                                                                          all_member[i].birthday, all_member[i].Email, all_member[i].DiscountCoupon1, \
                                                                          all_member[i].DiscountCoupon2);
        fclose(fptr_WriteMember);
        printf("    ---- Member's Information Deleted Successfully ----\n");
    }
    return 2;
}

void go_shopping(int _first_login)
{
    struct MyMerchandise myCart[100];
    int cart_counter = 0;

    Go_Shopping_Start:
    if(_first_login != 1)
    {
        printf("\n");
        system("pause");
    }
    system("cls");
    _first_login = 0;

    struct MyMerchandise all_merchandise[100];
    FILE *fptr_ReadMerchandise = fopen("MerchandisesData.txt", "r");
    if(fptr_ReadMerchandise == NULL)
    {
        printf("    ---- Error Merchandise Read ----\n");
        exit(EXIT_SUCCESS);
    }

    int counter = 0;
    while(!feof(fptr_ReadMerchandise))
    {
        fscanf(fptr_ReadMerchandise, "%d %s %d %s %d\n", &all_merchandise[counter].uniform_numbers, all_merchandise[counter].name, \
                                                         &all_merchandise[counter].price, all_merchandise[counter].firm, \
                                                         &all_merchandise[counter].stock);
        if((all_merchandise[counter].firm[0] == NULL) || (all_merchandise[counter].firm[0] == '\0'))
            break;
        counter++;
    }
    fclose(fptr_ReadMerchandise);

    printf("Hello, member. What do your want to do?\n");
    printf("**** Enter 0 To Search Merchandise\n");
    printf("           1 To Pick Merchandise Into Your Cart\n");
    printf("           2 To Show What Merchandise In Your Cart\n");
    printf("           3 To Delete Merchandise Which In your Cart\n");
    printf("           4 To Pay\n");
    printf("           5 To Go Back Home Page                   ****\n");
    printf("Enter your mode: ");
    int _select = 0;
    scanf("%d", &_select);
    switch(_select)
    {
        case 0:
            if(counter == 0)
            {
                printf("    ---- Do Not Have Any Merchandise's Information ----\n");
                goto Go_Shopping_Start;
            }

            printf("\n**** Enter 0 To Show All Merchandise\n");
            printf("           1 To Search By Name\n");
            printf("           2 To Search By Price\n");
            printf("           3 To Search By Firm     ****\n");
            printf("Enter your mode: ");
            scanf("%d", &_select);
            switch(_select)
            {
                case 0:
                {
                    printf("\n**** Data Table ****");
                    printf("\nNums\tName\tPrice\tFirm\tStock\n");
                    int find_counter = 0;
                    for(int i = 0; i < counter; i++)
                    {
                        find_counter++;
                        if(strlen(all_merchandise[i].name) < 8)
                            printf("%4d\t%s\t%4d\t%s\t%4d\n",all_merchandise[i].uniform_numbers, all_merchandise[i].name, \
                                                             all_merchandise[i].price, all_merchandise[i].firm, \
                                                             all_merchandise[i].stock);
                    }

                    if(find_counter == 0)
                        printf("    ---- Can Not Find Any Merchandise ----\n");
                    break;
                }

                // 在Switch .. Case .. 內無法宣告變數，若欲宣告則必須在Case 加上括弧
                case 1:
                {
                    printf("\n**** Search By Name ****\n");
                    printf("Enter merchandise name or key words: ");
                    char _search_name[7] = {NULL};
                    scanf("%s", _search_name);

                    printf("\n**** Data Table ****");
                    printf("\nNums\tName\tPrice\tFirm\tStock\n");
                    int find_counter = 0;
                    for(int i = 0; i < counter; i++)
                        if(strstr(all_merchandise[i].name, _search_name))
                        {
                            find_counter++;
                            printf("%4d\t%s\t%4d\t%s\t%4d\n",all_merchandise[i].uniform_numbers, all_merchandise[i].name, \
                                                             all_merchandise[i].price, all_merchandise[i].firm, \
                                                             all_merchandise[i].stock);
                        }
                    if(find_counter == 0)
                        printf("    ---- Can Not Find Any Merchandise ----\n");
                    break;
                }

                case 2:
                {
                    printf("\n**** Search By Price ****\n");
                    printf("Enter the minimum amount: ");
                    int _min_price = 0;
                    scanf("%d", &_min_price);
                    printf("Enter the maximum amount: ");
                    int _max_price = 0;
                    scanf("%d", &_max_price);

                    printf("\n**** Data Table ****");
                    printf("\nNums\tName\tPrice\tFirm\tStock\n");
                    int find_counter = 0;
                    for(int i = 0; i < counter; i++)
                        if((_min_price <= all_merchandise[i].price) && (all_merchandise[i].price <= _max_price))
                        {
                            find_counter++;
                            printf("%4d\t%s\t%4d\t%s\t%4d\n",all_merchandise[i].uniform_numbers, all_merchandise[i].name, \
                                                             all_merchandise[i].price, all_merchandise[i].firm, \
                                                             all_merchandise[i].stock);
                        }
                    if(find_counter == 0)
                        printf("    ---- Can Not Find Any Merchandise ----\n");
                    break;
                }

                case 3:
                {
                    printf("\n**** Search By Firm ****\n");
                    printf("Enter the firm name: ");
                    char _search_firm[5] = {NULL};
                    scanf("%s", _search_firm);

                    printf("\n**** Data Table ****");
                    printf("\nNums\tName\tPrice\tFirm\tStock\n");
                    int find_counter = 0;
                    for(int i = 0; i < counter; i++)
                        if(strcmp(all_merchandise[i].firm, _search_firm) == 0)
                        {
                            find_counter++;
                            printf("%4d\t%s\t%4d\t%s\t%4d\n",all_merchandise[i].uniform_numbers, all_merchandise[i].name, \
                                                             all_merchandise[i].price, all_merchandise[i].firm, \
                                                             all_merchandise[i].stock);
                        }
                    if(find_counter == 0)
                        printf("    ---- Can Not Find Any Merchandise ----\n");
                    break;
                }
            }
            goto Go_Shopping_Start;
            break;

        case 1:
        {
            //檢查商品狀況（若無商品則直接返回）
            if(counter == 0)
            {
                printf("    ---- Do Not Have Any Merchandise ----\n");
                goto Go_Shopping_Start;
            }

            //先顯示商品資訊
            printf("\n**** Data Table ****");
            printf("\nNums\tName\tPrice\tFirm\tStock\n");
            for(int i = 0; i < counter; i++)
                printf("%4d\t%s\t%4d\t%s\t%4d\n",all_merchandise[i].uniform_numbers, all_merchandise[i].name, \
                                                 all_merchandise[i].price, all_merchandise[i].firm, \
                                                 all_merchandise[i].stock);

            printf("\n**** Pick Merchandise And Put In The Cart ****\n");
            printf("Enter the merchandise's number: ");
            int _pick = 0;
            scanf("%d", &_pick);
            if(_pick >= counter)
            {
                printf("    ---- Do Not Have This Commoduty's Number ----\n");
                goto Go_Shopping_Start;
                return;
            }
            else
            {
                printf("Enter number of merchandise: ");
                int _number = 0;
                scanf("%d", &_number);
                if(_number <= 0)
                {
                    printf("    ---- Quantity Can Not Less Than One ----\n");
                    goto Go_Shopping_Start;
                    return;
                }
                if(_number > all_merchandise[_pick].stock)
                {
                    printf("    ---- Do Not Have More Then %2d Stock ----\n", all_merchandise[_pick].stock);
                    goto Go_Shopping_Start;
                    return;
                }

                //處理商品庫存
                FILE *fptr_WriteMerchandise = fopen("MerchandisesData.txt", "w");
                if(fptr_WriteMerchandise == NULL)
                {
                    printf("    ---- Error Merchandise Write ----\n");
                    exit(EXIT_SUCCESS);
                }
                else
                {
                    for(int i = 0; i < counter; i++)
                        if(i == _pick)
                            fprintf(fptr_WriteMerchandise, "%d %s %d %s %d\n", all_merchandise[i].uniform_numbers, all_merchandise[i].name, \
                                                                               all_merchandise[i].price, all_merchandise[i].firm, \
                                                                               all_merchandise[i].stock - _number);
                        else if(i != _pick)
                            fprintf(fptr_WriteMerchandise, "%d %s %d %s %d\n", all_merchandise[i].uniform_numbers, all_merchandise[i].name, \
                                                                               all_merchandise[i].price, all_merchandise[i].firm, \
                                                                               all_merchandise[i].stock);
                }
                fclose(fptr_WriteMerchandise);

                if(cart_counter == 0)
                {
                    myCart[cart_counter].uniform_numbers = cart_counter;
                    strcpy(myCart[cart_counter].name, all_merchandise[_pick].name);
                    myCart[cart_counter].price = all_merchandise[_pick].price;
                    strcpy(myCart[cart_counter].firm, all_merchandise[_pick].firm);
                    myCart[cart_counter].stock = _number;
                    cart_counter++;
                }
                else
                {
                    for(int i = 0; i < cart_counter; i++)
                    {
                        if((strcmp(all_merchandise[_pick].name, myCart[i].name) == 0) && (strcmp(all_merchandise[_pick].firm, myCart[i].firm) == 0))
                        {
                            myCart[i].stock += _number;
                            break;
                        }
                        else
                            if(i == cart_counter - 1)
                            {
                                myCart[cart_counter].uniform_numbers = cart_counter;
                                strcpy(myCart[cart_counter].name, all_merchandise[_pick].name);
                                myCart[cart_counter].price = all_merchandise[_pick].price;
                                strcpy(myCart[cart_counter].firm, all_merchandise[_pick].firm);
                                myCart[cart_counter].stock = _number;
                                cart_counter++;
                                break;
                            }
                    }
                }

                //顯示總金額
                int total_money = 0;
                if(cart_counter == 0)
                    printf("    ---- Do Not Have Any Merchandise In Your Cart ----\n");
                else
                {
                    for(int i = 0; i < cart_counter; i++)
                        total_money += myCart[i].price * myCart[i].stock;
                    printf("    ---- Total Money Should Pay: NT. %4d ----\n", total_money);
                }
                goto Go_Shopping_Start;
                break;
            }
        }

        case 2:
        {
            if(cart_counter == 0)
            {
                printf("    ---- Do Not Have Any Merchandise In Your Cart ----\n");
                goto Go_Shopping_Start;
            }
            else
            {
                printf("\n**** Data Table ****\n");
                printf("Nums\tName\tPrice\tFirm\tQuantity\n");
                int total_money = 0;
                for(int i = 0; i < cart_counter; i++)
                {
                    printf("%d\t%s\t%d\t%s\t%d\n", myCart[i].uniform_numbers, myCart[i].name, myCart[i].price, \
                                                   myCart[i].firm, myCart[i].stock);
                    total_money += myCart[i].price * myCart[i].stock;
                }
                printf("    ---- Total Money Should Pay: NT. %4d ----\n", total_money);
                goto Go_Shopping_Start;
            }
            break;
        }

        case 3:
        {
            if(cart_counter == 0)
            {
                printf("    ---- Do Not Have Any Merchandise In Your Cart ----\n");
                goto Go_Shopping_Start;
            }

            printf("\n**** Data Table ****\n");
            printf("Nums\tName\tPrice\tFirm\tQuantity\n");
            int total_money = 0;
            for(int i = 0; i < cart_counter; i++)
            {
                printf("%d\t%s\t%d\t%s\t%d\n", myCart[i].uniform_numbers, myCart[i].name, myCart[i].price, \
                                               myCart[i].firm, myCart[i].stock);
                total_money = myCart[i].price * myCart[i].stock;
            }

            printf("\n**** Delete Merchandise From Your Cart ****\n");
            printf("Enter the number: ");
            int _number = 0;
            scanf("%d", &_number);

            if(_number >= cart_counter)
            {
                printf("    ---- Do Not Have This Merchandise ----\n");
                goto Go_Shopping_Start;
            }
            else
            {
                printf("Enter the quantity: ");
                int _quantity = 0;
                scanf("%d", &_quantity);

                if(_quantity > myCart[_number].stock)
                {
                    printf("    ---- Can Not Enter More Than %2d Quantity ----\n");
                    goto Go_Shopping_Start;
                }
                else
                {
                    //先處理商品庫存
                    FILE *fptr_WriteMerchandise = fopen("MerchandisesData.txt", "w");
                    if(fptr_WriteMerchandise == NULL)
                    {
                        printf("    ---- Error Merchandise Write ----\n");
                        exit(EXIT_SUCCESS);
                    }
                    else
                    {
                        if(counter == 0)
                            fprintf(fptr_WriteMerchandise, "%d %s %d %s %d\n", 0, myCart[_number].name, myCart[_number].price, \
                                                                               myCart[_number].firm, _quantity);
                        else
                        {
                            for(int i = 0; i < counter; i++)
                                if((strcmp(myCart[_number].name, all_merchandise[i].name) == 0) && (strcmp(myCart[_number].firm, all_merchandise[i].firm) == 0))
                                {
                                    all_merchandise[i].stock += _quantity;
                                    break;
                                }
                                else
                                    if(i == counter - 1)
                                    {
                                        all_merchandise[counter].uniform_numbers = counter;
                                        strcpy(all_merchandise[counter].name, myCart[_number].name);
                                        all_merchandise[counter].price = myCart[_number].price;
                                        strcpy(all_merchandise[counter].firm, myCart[_number].firm);
                                        all_merchandise[counter].stock = myCart[_number].stock;
                                        counter++;
                                        break;
                                    }

                            for(int i = 0; i < counter; i++)
                                fprintf(fptr_WriteMerchandise, "%d %s %d %s %d\n", all_merchandise[i].uniform_numbers, all_merchandise[i].name, \
                                                                                   all_merchandise[i].price, all_merchandise[i].firm, \
                                                                                   all_merchandise[i].stock);
                        }
                    }
                    fclose(fptr_WriteMerchandise);

                    //處理結構陣列
                    if(_quantity == myCart[_number].stock)
                    {
                        if(cart_counter == 1)
                        {
                            memset(myCart, 0, sizeof(myCart));
                            cart_counter = 0;
                        }
                        else
                        {
                            for(int i = _number; i < cart_counter; i++)
                            {
                                myCart[i] = myCart[i + 1];
                                myCart[i].uniform_numbers = i;
                            }
                            cart_counter--;
                        }
                    }
                    else
                    {
                        myCart[_number].stock -= _quantity;
                    }

                    int total_money = 0;
                    for(int i = 0; i < cart_counter; i++)
                        total_money += myCart[i].price * myCart[i].stock;
                    printf("    ---- The Merchandise In Your Cart Is Deleted Successfully ----\n");
                    printf("    ---- Total Money Should Pay: NT. %4d ----\n", total_money);
                }
            }
            goto Go_Shopping_Start;
            break;
        }

        case 4:
        {
            int total_money = 0;
            if(cart_counter == 0)
            {
                printf("    ---- Do Not Have Any Merchandise In Your Cart ----\n");
                goto Go_Shopping_Start;
            }
            else
            {
                for(int i = 0; i < cart_counter; i++)
                    total_money += myCart[i].price * myCart[i].stock;
            }

            printf("\n**** Pay ****\n");
            printf("Total Money Should Pay: NT. %4d.\n", total_money);
            printf("Are you sure to pay? (y/n) ");
            char _pay;
            scanf(" %c", &_pay);

            if((_pay == 'y') || (_pay == 'Y'))
            {
                struct MyMember all_member[100];
                FILE *fptr_ReadMember = fopen("MembersData.txt", "r");
                if(fptr_ReadMember == NULL)
                {
                    printf("    ---- Error Member Read ----\n");
                    exit(EXIT_SUCCESS);
                }

                int counter = 0;
                while(!feof(fptr_ReadMember))
                {
                    fscanf(fptr_ReadMember, "%s %s %s %s %s %s %s %s %d %d\n", all_member[counter].userID, all_member[counter].name, all_member[counter].username, \
                                                                               all_member[counter].password, all_member[counter].phone, all_member[counter].address, \
                                                                               all_member[counter].birthday, all_member[counter].Email, &all_member[counter].DiscountCoupon1, \
                                                                               &all_member[counter].DiscountCoupon2);
                    counter++;
                }
                fclose(fptr_ReadMember);

                if(all_member[now_member_counter].DiscountCoupon1 == 0)
                {
                    if(all_member[now_member_counter].DiscountCoupon2 == 0)
                    {
                        //Nothing
                    }
                    else if(all_member[now_member_counter].DiscountCoupon2 != 0)
                    {
                        printf("Do you want to use [15%%-Off] discount coupon? (y/n) ");
                        char _DiscountCoupon2;
                        scanf(" %c", &_DiscountCoupon2);
                        if((_DiscountCoupon2 == 'y') || (_DiscountCoupon2 == 'Y'))
                        {
                            total_money = total_money * 0.85;
                            all_member[now_member_counter].DiscountCoupon2--;
                        }
                        else if ((_DiscountCoupon2 == 'n') || (_DiscountCoupon2 == 'N'))
                            total_money = total_money;
                        else
                        {
                            exit(EXIT_SUCCESS);
                            return;
                        }
                    }
                }
                else if(all_member[now_member_counter].DiscountCoupon2 == 0)
                {
                    if(all_member[now_member_counter].DiscountCoupon1 == 0)
                    {
                        //Nothing
                    }
                    else if(all_member[now_member_counter].DiscountCoupon1 != 0)
                    {
                        printf("Do you want to use [10%%-Off] discount coupon? (y/n) ");
                        char _DiscountCoupon1;
                        scanf(" %c", &_DiscountCoupon1);
                        if((_DiscountCoupon1 == 'y') || (_DiscountCoupon1 == 'Y'))
                        {
                            total_money = total_money * 0.9;
                            all_member[now_member_counter].DiscountCoupon1--;
                        }
                        else if ((_DiscountCoupon1 == 'n') || (_DiscountCoupon1 == 'N'))
                        {
                            total_money = total_money;
                        }
                        else
                        {
                            exit(EXIT_SUCCESS);
                            return;
                        }
                    }
                }
                else
                {
                    printf("Do you want to use [10%%-Off] or [15%%-Off] discount coupon? (y/n) ");
                    int _use_discount_coupon = 0;
                    scanf(" %c", &_use_discount_coupon);
                    if((_use_discount_coupon == 'y') || (_use_discount_coupon == 'Y'))
                    {
                        printf("\n**** Enter 0 To Use [10%%-Off],  1 To Use [15%%-Off] ****\n");
                        printf("Enter your mode: ");
                        int _select_discount_coupon;
                        scanf("%d", &_select_discount_coupon);
                        if(_select_discount_coupon == 0)
                        {
                            total_money = total_money * 0.9;
                            all_member[now_member_counter].DiscountCoupon1--;
                        }
                        else if(_select_discount_coupon == 1)
                        {
                            total_money = total_money * 0.85;
                            all_member[now_member_counter].DiscountCoupon2--;
                        }
                    }
                    else if((_use_discount_coupon == 'n') || (_use_discount_coupon == 'N'))
                    {
                        //Nothing
                    }
                    else
                    {
                        exit(EXIT_SUCCESS);
                        return;
                        break;
                    }
                }

                FILE *fptr_WriteMember = fopen("MembersData.txt", "w");
                if(fptr_WriteMember == NULL)
                {
                    printf("    ---- Error Member Write ----\n");
                    exit(EXIT_SUCCESS);
                }
                else
                {
                    int _get_DiscountCoupon1 = 0, _get_DiscountCoupon2 = 0;
                    if((1000 <= total_money) && (total_money < 2000))
                        _get_DiscountCoupon1++;
                    else if(2000 <= total_money)
                        _get_DiscountCoupon2++;

                    all_member[now_member_counter].DiscountCoupon1 += _get_DiscountCoupon1;
                    all_member[now_member_counter].DiscountCoupon2 += _get_DiscountCoupon2;
                    for(int i = 0; i < counter; i++)
                        fprintf(fptr_WriteMember,  "%s %s %s %s %s %s %s %s %d %d\n", all_member[i].userID, all_member[i].name, \
                                                                                      all_member[i].username, all_member[i].password, \
                                                                                      all_member[i].phone, all_member[i].address, \
                                                                                      all_member[i].birthday, all_member[i].Email, \
                                                                                      all_member[i].DiscountCoupon1, all_member[i].DiscountCoupon2);
                    fclose(fptr_WriteMember);

                    printf("    ---- NT. %4d Payment Successful ----\n", total_money);
                    printf("    ---- You Get  %2d of [10%%-Off] Discount Coupon\n", _get_DiscountCoupon1);
                    printf("                  %2d of [15%%-Off] Discount Coupon ----\n", _get_DiscountCoupon2);
                    printf("    ---- Now Have %2d of [10%%-Off] Discount Coupon\n", all_member[now_member_counter].DiscountCoupon1);
                    printf("                  %2d of [15%%-Off] Discount Coupon ----\n", all_member[now_member_counter].DiscountCoupon2);

                    total_money = 0;
                    memset(myCart, 0, sizeof(myCart));

                    printf("\n");
                    system("pause");
                    return;
                }
            }
            else if((_pay == 'n') || (_pay == 'N'))
            {
                printf("    ---- Payment Failure ----\n");
                goto Go_Shopping_Start;
                break;
            }
            else
            {
                exit(EXIT_SUCCESS);
                return;
            }
            memset(myCart, 0, sizeof(myCart));
            break;
        }

        case 5:
        {
            if(cart_counter == 0)
                return;
            else
            {
                for(int i = 0; i < cart_counter; i++)
                {
                    for(int j = 0; j < counter; j++)
                    {
                        if((strcmp(myCart[i].name, all_merchandise[j].name) == 0) && (strcmp(myCart[i].firm, all_merchandise[j].firm) == 0))
                        {
                            all_merchandise[j].stock += myCart[i].stock;
                            break;
                        }
                        else
                        {
                            if(j == counter - 1)
                            {
                                all_merchandise[counter].uniform_numbers = counter;
                                strcpy(all_merchandise[counter].name, myCart[i].name);
                                all_merchandise[counter].price = myCart[i].price;
                                strcpy(all_merchandise[counter].firm, myCart[i].firm);
                                all_merchandise[counter].stock = myCart[i].stock;
                                counter++;
                            }
                        }
                    }
                }
            }

            FILE *fptr_WriteMerchandise = fopen("MerchandisesData.txt", "w");
            if(fptr_WriteMerchandise == NULL)
            {
                printf("    ---- Error Merchandise Write ----\n");
                exit(EXIT_SUCCESS);
            }
            else
            {
                for(int i = 0; i < counter; i++)
                    fprintf(fptr_WriteMerchandise, "%d %s %d %s %d\n", all_merchandise[i].uniform_numbers, all_merchandise[i].name, \
                                                                       all_merchandise[i].price, all_merchandise[i].firm, \
                                                                       all_merchandise[i].stock);
                fclose(fptr_WriteMerchandise);
            }
            memset(myCart, 0, sizeof(myCart));
            break;
        }

        default:
            break;
    }
    return;
}

void watch_member_informations()
{
    system("cls");
    printf("**** (Member) Watch Your Informations ****\n");

    struct MyMember all_member[100];
    FILE *fptr_ReadMember = fopen("MembersData.txt", "r");
    if(fptr_ReadMember == NULL)
    {
        printf("    ---- Error Member Read ----\n");
        exit(EXIT_SUCCESS);
    }

    int counter = 0;
    while(!feof(fptr_ReadMember))
    {
        fscanf(fptr_ReadMember, "%s %s %s %s %s %s %s %s %d %d\n", all_member[counter].userID, all_member[counter].name, all_member[counter].username, \
                                                                   all_member[counter].password, all_member[counter].phone, all_member[counter].address, \
                                                                   all_member[counter].birthday, all_member[counter].Email, &all_member[counter].DiscountCoupon1, \
                                                                   &all_member[counter].DiscountCoupon2);
        counter++;
    }
    fclose(fptr_ReadMember);

    printf("\n**** Date Table ****\n");
    printf("Items\t\t\t\tValue\n");
    printf("%s\t\t\t%s\n", "ID_Number", all_member[now_member_counter].userID);
    printf("%s\t\t\t\t%s\n", "Name", all_member[now_member_counter].name);
    printf("%s\t\t\t%s\n", "Username", all_member[now_member_counter].username);
    printf("%s\t\t\t%s\n", "Password", all_member[now_member_counter].password);
    printf("%s\t\t\t\t%s\n", "Phone", all_member[now_member_counter].phone);
    printf("%s\t\t\t\t%s\n", "Address", all_member[now_member_counter].address);
    printf("%s\t\t\t%s\n", "Birthday", all_member[now_member_counter].birthday);
    printf("%s\t\t\t\t%s\n", "E-Mail", all_member[now_member_counter].Email);
    printf("%s\t\t%d\n", "10%-Off Discount Coupon", all_member[now_member_counter].DiscountCoupon1);
    printf("%s\t\t%d\n", "15%-Off Discount Coupon", all_member[now_member_counter].DiscountCoupon2);

    return;
}

int update_member_informations()
{
    GO_Update_Member_Informations:
    system("cls");
    printf("**** (Member) Updata Your Informations ****\n");

    /* Random Code*/
    srand(time(NULL));
    char code[5] = {NULL};
    while(1)
    {
        for(int i = 0; i < 5; i++)
        {
            int _select_code_style = rand() % 2;
            if(_select_code_style == 0)
            {
                int ranE = rand() % 2;
                if(ranE == 0)
                    code[i] = (char)(rand() % 26 + 65);
                else if(ranE == 1)
                    code[i] = (char)(rand() % 26 + 97);
            }
            else if(_select_code_style == 1)
            {
                code[i] = (char)(rand() % 10 + 48);
            }
        }

        int check_code_N = 0, check_code_E = 0;
        for(int i = 0; i < 5; i++)
            if((48 <= (int)code[i]) && ((int)code[i] <= 57))
                check_code_N++;
            else if(((65 <= (int)code[i]) && ((int)code[i] <= 90)) || ((97 <= (int)code[i]) && ((int)code[i] <= 122)))
                check_code_E++;
        if((check_code_N != 5) && (check_code_E != 5))
            break;
    }
    printf("\n**** Before Update Informations, Please Enter The Code What You See ****\n");
    printf("[%s]: ", code);
    char input_code[5] = {NULL};
    scanf("%s", input_code);

    if(strcmp(input_code, code) == 0)
    {
        printf("    ---- Currect ----\n");
        struct MyMember all_member[100];
        FILE *fptr_ReadMember = fopen("MembersData.txt", "r");
        if(fptr_ReadMember == NULL)
        {
            printf("    ---- Error Member Read ----\n");
            exit(EXIT_SUCCESS);
        }

        int counter = 0;
        while(!feof(fptr_ReadMember))
        {
            fscanf(fptr_ReadMember, "%s %s %s %s %s %s %s %s %d %d\n", all_member[counter].userID, all_member[counter].name, all_member[counter].username, \
                                                                       all_member[counter].password, all_member[counter].phone, all_member[counter].address, \
                                                                       all_member[counter].birthday, all_member[counter].Email, &all_member[counter].DiscountCoupon1, \
                                                                       &all_member[counter].DiscountCoupon2);
            counter++;
        }
        fclose(fptr_ReadMember);

        struct MyMember update_member;
        printf("\n**** Update Member's Informations ****\n");
        strcpy(update_member.userID, all_member[now_member_counter].userID);
        printf("Update your [Name]: ");
        scanf("%s", update_member.name);
        strcpy(update_member.username, all_member[now_member_counter].username);
        printf("Update your [Password]: ");
        scanf("%s", update_member.password);
        printf("Update your [Phone]: ");
        scanf("%s", update_member.phone);
        printf("Update your [Address]: ");
        scanf("%s", update_member.address);
        printf("Update your [Birthday]: ");
        scanf("%s", update_member.birthday);
        printf("Update your [Email]: ");
        scanf("%s", update_member.Email);
        update_member.DiscountCoupon1 = all_member[now_member_counter].DiscountCoupon1;
        update_member.DiscountCoupon2 = all_member[now_member_counter].DiscountCoupon2;

        all_member[now_member_counter] = update_member;

        FILE *fptr_WriteMember = fopen("MembersData.txt", "w");
        if(fptr_WriteMember == NULL)
        {
            printf("    ---- Error Member Write ----\n");
            exit(EXIT_SUCCESS);
        }
        else
        {
            for(int i = 0; i < counter; i++)
                fprintf(fptr_WriteMember,  "%s %s %s %s %s %s %s %s %d %d\n", all_member[i].userID, all_member[i].name, all_member[i].username, \
                                                                              all_member[i].password, all_member[i].phone, all_member[i].address, \
                                                                              all_member[i].birthday, all_member[i].Email, all_member[i].DiscountCoupon1, \
                                                                              all_member[i].DiscountCoupon2);
            fclose(fptr_WriteMember);
            printf("    ---- Member's Information Updated Successfully ----\n");
        }
    }
    else
    {
        printf("    ---- Error Code ----\n");
        printf("\nDo you want to try again? (y/n) ");
        char _select;
        scanf(" %c", &_select);
        switch(_select)
        {
            case 'y':
            case 'Y':
                goto GO_Update_Member_Informations;
                break;

            case 'n':
            case 'N':
                return 0;
                break;

            default:
                exit(EXIT_SUCCESS);
                return 1;
                break;
        }
    }
    return 2;
}

int main(int argc, char const *argv[])
{
    system("cls");
    int _close = 0;
    //Check MembersData.txt
    FILE *fptr_CheckFile = fopen("MembersData.txt", "r");
    if(fptr_CheckFile == NULL)
    {
        printf("**** ERROR Message ****\n");
        printf("    ---- Do Not Have [MembersData.txt] File ----\n");
        _close = 1;
    }
    else
        fclose(fptr_CheckFile);
    //Check MerchandisesData.txt
    fptr_CheckFile = fopen("MerchandisesData.txt", "r");
    if(fptr_CheckFile == NULL)
    {
        if(_close == 0)
            printf("**** ERROR Message ****\n");
        printf("    ---- Do Not Have [MerchandisesData.txt] File ----\n");
        _close = 1;
    }
    else
        fclose(fptr_CheckFile);
    if(_close != 0)
    {
        printf("\n**** Press Any Key To Exit Program ****\n");
        system("pause");
        exit(EXIT_SUCCESS);
    }

    system("cls");
    printf("**** Enter 0 To Sign In, 1 To Sign Up, -1 To Exit Program. ****\n");
    printf("Enter your mode: ");
    int _select = 0;
    scanf("%d", &_select);
    switch(_select)
    {
        case -1:
            exit(EXIT_SUCCESS);
            return 0;
            break;

        case 0:
            switch(_signIn())
            {
                case 0:
                    printf("\n");
                    system("pause");
                    main(0, NULL);
                    break;

                case 1:
                {
                    int _where_goback = 0;
                    AdministratorSignIn:
                    printf("\n");
                    if(_where_goback != 0)
                        system("pause");
                    _where_goback = 1;

                    system("cls");
                    printf("Hello, administrator. What do your want to do?\n");
                    printf("**** Enter 0 To Watch All Merchandise Informations\n");
                    printf("           1 To Add New Merchandise\n");
                    printf("           2 To Update Merchandise Informations\n");
                    printf("           3 To Delete Merchandise Informaions\n");
                    printf("           4 To Watch All Member Informaions\n");
                    printf("           5 To Delete Member Informations\n");
                    printf("           9 To Sign Out                         ****\n");
                    printf("Enter your mode: ");
                    scanf("%d", &_select);
                    switch(_select)
                    {
                        case -1:
                            exit(EXIT_SUCCESS);
                            return 0;
                            break;

                        case 0:
                            watch_all_merchandise_information();
                            goto AdministratorSignIn;
                            break;

                        case 1:
                            add_new_merchandise_information();
                            goto AdministratorSignIn;
                            break;

                        case 2:
                            _where_goback = update_the_merchandise_information();
                            goto AdministratorSignIn;
                            break;

                        case 3:
                            _where_goback = delete_the_merchandise_informaion();
                            goto AdministratorSignIn;
                            break;

                        case 4:
                            watch_all_members_information();
                            goto AdministratorSignIn;
                            break;

                        case 5:
                            _where_goback = delete_the_member_information();
                            goto AdministratorSignIn;
                            break;

                        case 9:
                            main(0, NULL);
                            return 0;
                            break;

                        default:
                            return 0;
                    }
                    break;
                }

                case 2:
                {
                    int _where_goback = 0;
                    MemberSignIn:
                    printf("\n");
                    if(_where_goback != 0)
                        system("pause");
                    _where_goback = 1;

                    system("cls");
                    printf("Hello, member. What do your want to do?\n");
                    printf("**** Enter 0 To Go Shopping\n");
                    printf("           1 To Watch Your Informations\n");
                    printf("           2 To Update Your Informations\n");
                    printf("           9 To Sign Out                 ****\n");
                    printf("Enter your mode: ");
                    scanf("%d", &_select);
                    switch(_select)
                    {
                        case -1:
                            exit(EXIT_SUCCESS);
                            return 0;
                            break;

                        case 0:
                            go_shopping(1);
                            _where_goback = 0;
                            goto MemberSignIn;
                            break;

                        case 1:
                            watch_member_informations();
                            goto MemberSignIn;
                            break;

                        case 2:
                            _where_goback = update_member_informations();
                            goto MemberSignIn;
                            break;

                        case 9:
                            main(0, NULL);
                            return 0;
                            break;

                        default:
                            return 0;
                    }
                    break;
                }
            }
            break;

        case 1:
            _signUp();
            printf("\n");
            system("pause");
            main(0, NULL);
            break;

        default:
            return 0;
    }
    return 0;
}