supershop

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

typedef struct Node
{
    char code[20];
    char type[20];
    char name[20];
    int price;
    int num;
    char date[20];
    struct Node *next;
} node;
int t=0;
void insert_after(node *p,char name[20],char code[20],int num,char type[20],int price,char ex_date[20])
{
    while(p->next != NULL)
    {
        p = p->next;
    }
    p->next = (node *)malloc(sizeof(node));

    strcpy(p->next->name,name);
    strcpy(p->next->code,code);
    p->next->num = num;
    strcpy(p->next->type,type);
    p->next->price = price;
    strcpy(p->next->date,ex_date);
    p->next->next = NULL;
}
/*void insert_first(node *p,char name[20], char id[20], char dept[20], char bg[5], char cont[20])
{
    node *temp;
    temp = (node *)malloc(sizeof(node));

    strcpy(temp->name,name);
    strcpy(temp->id,id);
    strcpy(temp->dept,dept);
    strcpy(temp->bg,bg);
    strcpy(temp->phone,cont);

    temp->next = p->next;
    p->next = temp;
}
void edit_data(node *p,char id[])
{
    int n,ct=0;
    char name1[20];
    char id1[20];
    char dept1[20];
    char bg1[20];
    char phone1[20];
    //node *temp = search(p,id);
    p = p->next;
    while(p != NULL)
    {
        if(strcmp(p->id,id) == 0)
        {
            printf("\n****Student's Data To Edit****\n");

            printf("1.Student name       : %s\n", p->name);
            printf("2.Student ID         : %s\n", p->id);
            printf("3.Student Department : %s\n", p->dept);
            printf("4.Student Blood group: %s\n", p->bg);
            printf("5.Student Contact    : %s\n\n",p->phone);

            printf("Select your option to Edit: ");

            scanf("%d",&n);

            if(n == 1)
            {
                printf("Enter the name: ");
                scanf(" %[^\n]s",name1);
                strcpy(p->name,name1);
            }
            else if(n == 2)
            {
                printf("Enter the ID: ");
                scanf(" %s",id1);
                strcpy(p->id,id1);
            }
            else if(n == 3)
            {
                printf("Enter the Department: ");
                scanf("%s",dept1);
                strcpy(p->dept,dept1);
            }
            else if(n == 4)
            {
                printf("Enter the Blood Group: ");
                scanf("%s",bg1);
                strcpy(p->bg,bg1);
            }
            else if(n == 5)
            {
                printf("Enter the Contact: ");
                scanf("%s",phone1);
                strcpy(p->phone,phone1);
            }
            else
            {
                printf("\nError Selection!!\n");
            }
        }
        ct++;
        p = p -> next;
    }
    if(ct == 0)
        printf("\nElement not Found!\n");

}

int search(node *p, char id[20])
{
    p = p->next;
    while(p != NULL)
    {
        if(strcmp(p->id,id) == 0)
        {
            printf("\n****Displaying Searched Information****\n");

            printf("Student name       : %s\n", p->name);
            printf("Student ID         : %s\n", p->id);
            printf("Student Department : %s\n", p->dept);
            printf("Student Blood group: %s\n", p->bg);
            printf("Student Contact    : %s\n\n",p->phone);

            return;
        }
        p = p -> next;
    }
    printf("Sorry!Element not found.\n");
    return;
}
void blood_grp(node *p, char bg[5])
{
    int ct=0;
    p = p->next;
    printf("\n****Information of Desired Blood Group****\n");

    while(p != NULL)
    {
        if(strcmp(p->bg,bg)==0)
        {
            ct++;
            printf("\nStudent Name  : %s\n",p->name);
            printf("Blood Group   : %s\n",p->bg);
            printf("Contact number: %s\n",p->phone);
        }
        p = p->next;
    }
    if(ct == 0)
        printf("\nNot found\n");
}

void dept_search(node *p, char dept[20])
{
    int ct=0;
    p = p->next;
    printf("\n****Department Wise Student Information****\n\n");

    while(p != NULL)
    {
        if(strcmp(p->dept,dept)==0)
        {
            ct++;
            printf("Student name       : %s\n", p->name);
            printf("Student ID         : %s\n", p->id);
            printf("Student Department : %s\n", p->dept);
            printf("Student Blood group: %s\n", p->bg);
            printf("Student Contact    : %s\n\n", p->phone);
        }
        p = p->next;
    }
    if(ct == 0)
        printf("\nNot found\n");
}*/
int sold(node *p, char code[20],int pc)
{
    int ct=0,sum=0;
    //node *temp;
    while(p->next != NULL)
    {
        if(strcmp(p->next->code,code) == 0)
        {
            for(int i=0; i<pc; i++){

                sum = sum + p->next->price;
            }
            p->next->num = p->next->num - pc;
            return sum;
        }
        p = p->next;
    }
    if(ct == 0)
    {
        printf("Element Not Found!!\n");
    }
}

void display(node *p)
{
    while(p -> next != NULL)
    {
        printf("Product name        : %s\n", p->next->name);
        printf("Product CODE        : %s\n", p->next->code);
        printf("Number of Products  : %d Pieces\n",p->next->num);
        printf("Product TYPE        : %s\n", p->next->type);
        printf("Product PRICE       : %d\n", p->next->price);
        printf("Product EXPIRED DATE: %s\n\n", p->next->date);
        //printf("Student name: %s\n", p->next->name);
        p = p->next;
    }
}
int total(int sum)
{
   t = t + sum;
   return t;
}
int main()
{
    int n,p,s;
    char q;
    char name[20];
    char code[20];
    char type[20];
    int num;
    int price;
    char ex_date[20];

    node *start = (node *)malloc(sizeof(node));
    start -> next = NULL;

    while(1)
    {
        printf("\n\n1. Insert Product data\n");
        printf("2. Buyer's BILL\n");
        printf("3. Display\n");
        printf("4. Total SALE\n");
        printf("5. Insert at first\n");
        printf("6. Edit Student information\n");
        printf("7. Search Blood Group\n");
        printf("8. Search Department\n");

        printf("\nEnter your choice: ");

        scanf(" %c",&q);

        switch(q)
        {
        case '1':
            printf("\nIf your want to EXIT press '0' else press any key\n");
            scanf("%d",&s);

            if(s == 0)
                break;
            else{
            printf("\n\nEnter Product information\n\n");
            printf("Enter name: ");
            scanf(" %[^\n]s", name);
            printf("Enter CODE: ");
            scanf("%s", code);
            printf("Number of product: ");
            scanf("%d",&num);
            printf("Enter Product Type: ");
            scanf(" %s", type);
            printf("Enter Product Price: ");
            scanf("%d", &price);
            printf("Enter Product Expired Date: ");
            scanf(" %s", ex_date);

            insert_after(start,name,code,num,type,price,ex_date);
            }
            break;

        case '2':
            printf("\nIf your want to EXIT press '0' else press any key\n");
            scanf("%d",&s);

            if(s == 0)
                break;
            else{
            printf("Enter the Numbers of Sold product: ");
            scanf("%d",&n);
            int sum =0;
            for(int i=0; i<n; i++){
                    printf("Enter the Product code: ");
                    scanf("%s", code);
                    printf("How many pieces? :- ");
                    scanf("%d",&p);
                    sum = sum+ sold(start,code,p);
            }
            total(sum);
            printf("Total BILL: %d taka\n",sum);
            }
            break;

        case '3':
            printf("\nIf your want to EXIT press '0' else press any key\n");
            scanf("%d",&s);

            if(s == 0)
                break;
            else{
            printf("\n\n****Product's information****\n\n");
            display(start);
            }
            break;
        case '4':
            printf("\nIf your want to EXIT press '0' else press any key\n");
            scanf("%d",&s);

            if(s == 0)
                break;
            else{
                printf("Total Daily SALE: %d\n",t);
            }
            break;
        /*case '4':
            printf("\nIf your want to EXIT press '0' else press any key\n");
            scanf("%d",&s);

            if(s == 0)
                break;
            else{
            printf("Enter the ID: ");
            scanf("%s",id);
            search(start,id);
            }
            break;
       case '5':
            printf("\nIf your want to EXIT press '0' else press any key\n");
            scanf("%d",&s);

            if(s == 0)
                break;
            else{
            printf("\n\nEnter student information\n\n");
            printf("Enter name: ");
            scanf(" %[^\n]s", name);
            printf("Enter ID: ");
            scanf("%s", id);
            printf("Enter Department: ");
            scanf(" %[^\n]s", dept);
            printf("Enter Blood Group: ");
            scanf("%s", bg);
            printf("Enter contact: ");
            scanf("%s", phone);

            insert_first(start,name,id,dept,bg,phone);
            }
            break;
        case '6':
            printf("\nIf your want to EXIT press '0' else press any key\n");
            scanf("%d",&s);

            if(s == 0)
                break;
            else{
            printf("\nEnter the ID to Edit data: ");
            scanf("%s",id);
            edit_data(start,id);
            }
            break;
        case '7':
            printf("\nIf your want to EXIT press '0' else press any key\n");
            scanf("%d",&s);

            if(s == 0)
                break;
            else{
            printf("\nEnter the desired Blood Group: ");
            scanf("%s",bg);
            blood_grp(start,bg);
            }
            break;
        case '8':
            printf("\nIf your want to EXIT press '0' else press any key\n");
            scanf("%d",&s);

            if(s == 0)
                break;
            else{
            printf("\nEnter Department Name: ");
            scanf("%s",dept);
            dept_search(start,dept);
            }
            break;*/
        default:
            printf("Invalid choice.Try again!\n");
            break;
        }
    }
}