Source Code

/*
  This source code is written in Linux
  some syntax will not be recognized
  by Windows compiler. If you faced a
  problem, please review and fix the code
  yourself.

  SESSIONS VARIABLES
    - temporary and will be cleared after the session is over
  TRANSACTIONS VARIABLES
    - record sessions data
*/

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

#ifdef linux
#define CLS_NAME "clear"
#else
#define CLS_NAME "cls"
#endif

// GLOBAL VARIABLES DECLARATIONS
/*
    itemQuantity[][0] = Item Qty in inventory
    itemQuantity[][1] = Item Qty in a session
    itemQuantity[][2] = Item Qty in all transactions
    item_Price_Profit[][0] = Item Price
    item_Price_Profit[][1] = Item Profit
*/
int totalItem=13,itemQuantity[][3]={8,0,0,9,0,0,11,0,0,0,0,0,20,0,0,22,0,0,16,0,0,18,0,0,9,0,0,7,0,0,5,0,0,12,0,0,0,0,0},sessionQuantity,sessionNumber=1,hiddenItemQuantity[]={},itemId;
float item_Price_Profit[][2]={1,0.5,2,0.2,3,0.2,4,0.2,5,0.5,6,0.8,7,0.5,8,0.2,9,0.2,10,0.2,11,0.5,12,0.8,13,0.9},sesionTotalPrice,transactionTotalProfit=0,transactionTotalPrice=0,sessionPayment;
char itemName[][30]={"STABILO PENCIL 2B","STABILO PEN 0.5","STABILO ERASER","STABILO RULER","STABILO TEST PAD","STABILO BOOK","STABILO SCISSORS","STABILO SHARPENER","STABILO GLUE","STABILO CHALK","STABILO MARKER PEN","OXFORD DICTIONARY","STABILO HIGHLIGHTER"},dummy;

// FUNCTIONS PROTOTYPES
void showTime();void menuSelection(int);void newTransaction();void allTransactions();void addItem();void reviewCart();void removeItem();void sessionReceipt();void gotoMenu();void calcQuantity(int);void allStocks();void addStock();void addStockItem();void editStockItem();void hideStockItem();void getItemId(int);void getItemQty();void getNewItemProfit(int);void getAuth();

// DISPLAY MENU
main(){
    int choice;
    system(CLS_NAME);
    showTime();
    printf("Assalamualaikum\n\nMAIN MENU :\n\n    1 - New Transaction\n    2 - All Transactions\n    3 - Stocks\n\nPlease select an option : ");
    scanf("%d",&choice);
    if(choice>0&&choice<4) menuSelection(choice);
    else main();
}

void showTime(){
    time_t mytime;
    mytime = time(NULL);
    printf("%38s",ctime(&mytime));
}

// MENU SELECTION
void menuSelection(int choice){
    if(choice!=6) system(CLS_NAME);
    switch(choice){
        case 1  :   sesionTotalPrice = 0;
                    newTransaction();break;
        case 2  :   allTransactions();break;
        case 3  :   //getAuth(); break;
                    allStocks(); break;
        case 4  :   addStock();break;
        case 5  :   addStockItem();break;
        case 6  :   getItemId(3);
                    editStockItem();break;
        case 7  :   getItemId(4);
                    hideStockItem();break;
        case 8  :   main();break;
        default :   main();break;
    }
}

// SHOWS ITEMS LIST
void newTransaction(){
    int i;
    system(CLS_NAME); //system("cls");
    printf("INVENTORY           SESSION NO  :       %3d\n",sessionNumber);
    printf("                    TOTAL PRICE : RM %6.2f\n\n",sesionTotalPrice);
    printf("ID  Item                        Qty   Price\n");
    printf("-------------------------------------------\n");

    for (i=0;i<totalItem;i++){
        if (itemQuantity[i][0]==-1) ;
        else if (itemQuantity[i][0]==0) printf("%-2d  %-27sOUT OF STOCK\n",i,itemName[i]);
        else printf("%-2d  %-28s%3d  %6.2f\n",i,itemName[i],itemQuantity[i][0],item_Price_Profit[i][0]);
    }
    printf("-------------------------------------------\n");
    printf("-1 VIEW CART\n99 CHECK OUT\n");
    addItem();
}

/*GET ITEM ID :
    1=TO BE ADDED TO CART,
    2=TO BE REMOVED FROM CART,
    3=TO BE EDITED,
    4=TO BE REMOVED,*/
void getItemId(int i){
    switch(i){
        case 1 :    printf("\nPlease enter Item ID to add to cart : ");break;
        case 2 :    printf("\nPlease enter Item ID to hide from cart : ");break;
        case 3 :    printf("ID of item to be edited : ");break;
        case 4 :    printf("ID of item to be hide/unhide : ");break;
        case 5 :    printf("ID of item to be restocked : ");break;
    }
    scanf("%d",&itemId);
    if(i==3 && itemId>=totalItem) {
        printf("Item does not exist. Create? Y to confirm : ");
        fflush(stdin);
        scanf("%s",&dummy);
        if(toupper(dummy)!='Y') allStocks();
        itemId = totalItem++;
    }
}

void getItemQty(){
    printf("Please enter Item Quantity : ");
    scanf("%d",&sessionQuantity);
}

// GET ITEM ID & QTY FROM USER TO BE ADDED TO SESSIONS VARIABLES
void addItem(){
    getItemId(1);
    if (itemId==-1) reviewCart();
    if (itemId==99) sessionReceipt();
    if (itemId>=totalItem) newTransaction();
    if (itemQuantity[itemId][0]==0||itemQuantity[itemId][0]==-1) {
        printf("--UNAVAILABLE--\n");
        sleep(1);
        newTransaction();
    }
    if (itemQuantity[itemId][0]==1) {
        itemQuantity[itemId][0] --;
        itemQuantity[itemId][1] ++;
        itemQuantity[itemId][2] ++;
        sesionTotalPrice += item_Price_Profit[itemId][0];
        newTransaction();
    }
    getItemQty();
    if (sessionQuantity<0){
        printf("--INVALID--\n");
        sleep(1);
        newTransaction();
    }
    if (sessionQuantity>itemQuantity[itemId][0]){
        printf("--INSUFFICIENT--\n");
        sleep(1);
        newTransaction();
    }
    calcQuantity(1);
    newTransaction();
}

// DISPLAY DATA STORED IN SESSIONS VARIABLES
void reviewCart(){
    int i;
    system(CLS_NAME); //system("cls");
    printf("INVENTORY           SESSION NO  :       %3d\n",sessionNumber);
    printf("                    TOTAL PRICE : RM %6.2f\n\n",sesionTotalPrice);
    printf("ID  Item                       Price Amount\n");
    printf("-------------------------------------------\n");
    for (i=0;i<totalItem;i++){
        if (itemQuantity[i][1]!=0)
            printf("%-2d %2dx%-24s %5.2f %6.2f\n",i,itemQuantity[i][1],itemName[i],item_Price_Profit[i][0],item_Price_Profit[i][0]*itemQuantity[i][1]);
    }
    printf("                                     ------\n");
    printf("SUB TOTAL                            %6.2f\n",sesionTotalPrice);
    printf("-------------------------------------------\n");
    printf("-1 BROWSE INVENTORY\n99 CHECK OUT\n");
    removeItem();
}

// GET ITEM ID & QTY FROM USER TO BE hide FROM SESSIONS VEARIABLES
void removeItem(){
    getItemId(2);
    if (itemId==-1) newTransaction();
    if (itemId==99) sessionReceipt();
    if (itemId>=totalItem) removeItem();
    if (itemQuantity[itemId][1]==1) {
        itemQuantity[itemId][0] ++;
        itemQuantity[itemId][1] --;
        itemQuantity[itemId][2] --;
        sesionTotalPrice -= item_Price_Profit[itemId][0];
        reviewCart();
    }
    if (itemQuantity[itemId][1]==0||itemQuantity[itemId][0]==-1) {
        printf("--ITEM INEXISTENT--\n");
        sleep(1);
        reviewCart();
    }
    getItemQty();
    if (sessionQuantity<0){
        printf("--INVALID--\n");
        sleep(1);
        reviewCart();
    }
    if (sessionQuantity>itemQuantity[itemId][1]){
        printf("--INSUFFICIENT--\n");
        sleep(1);
        reviewCart();
    }
    calcQuantity(-1);
    reviewCart();
}

// DISPLAY SESSION RECEIPT - ONE TIME ONLY
void sessionReceipt(){
    int i;
    system(CLS_NAME); //system("cls");
    showTime();
    printf("Receipt number : %d\n",sessionNumber);
    printf("-------------------------------------\n");
    printf("Item\t\tQty   Price    Amount\n");
    for (i=0;i<totalItem;i++){
        if (itemQuantity[i][1]!=0)
            printf("%d\t\t%3d   %5.2f    %6.2f\n%s\n",i,itemQuantity[i][1],item_Price_Profit[i][0],item_Price_Profit[i][0]*itemQuantity[i][1],itemName[i]);
        if(sessionPayment!=0) itemQuantity[i][1]=0;
    }
    printf("\n                            ---------\n");
    printf("SUB TOTAL                      %6.2f",sesionTotalPrice);
    printf("\n                            ---------\n\n");
    if(sessionPayment==0){
        printf("CASH     : ");
        scanf("%f",&sessionPayment);
        sessionReceipt();
    }else printf("CASH     : %.2f\n",sessionPayment);
    printf("CHANGE   : %.2f\n",sessionPayment-sesionTotalPrice);
    printf("\n\n-------------------------------------\n");
    printf("---------THANK YOU FOR COMING--------\n");
    printf("-------------------------------------\n");
    transactionTotalPrice += sesionTotalPrice;
    sessionNumber++;
    sessionPayment=0;
    gotoMenu();
}

// DISPLAY TOTAL TRANSACTIONS
void allTransactions(){
    int i;
    system(CLS_NAME); //system("cls");
    printf("ALL TRANCTIONS\n\n");
    printf("ID  Item                        Price  Profit\n");
    printf("---------------------------------------------\n");
    for (i=0;i<totalItem;i++){
        if (itemQuantity[i][2]!=0)
            printf("%-2d %2dx%-24s %6.2f  %6.2f\n",i,itemQuantity[i][2],itemName[i],item_Price_Profit[i][0]*itemQuantity[i][2],item_Price_Profit[i][1]*itemQuantity[i][2]);
        transactionTotalProfit += item_Price_Profit[i][1]*itemQuantity[i][2];
    }
    printf("                               ------  ------\n");
    printf("TOTAL                          %6.2f  %6.2f\n",transactionTotalPrice,transactionTotalProfit);
    printf("                               ------  ------\n");
    printf("TOTAL TRANSACTIONS                     %6d\n",sessionNumber-1);
    printf("---------------------------------------------\n");
    transactionTotalProfit = 0;
    gotoMenu();
}

// PAUSE PROGRAM AND CONTINUE WITH dummy KEY ENTRY
void gotoMenu(){
    printf("\n\nPress Enter to continue...");
    fflush(stdin);
    dummy = getchar();
    while (getchar() != '\n');
    main();
}

// CALCULATE QUANTITY IN SESSIONS AND TRANSACTIONS
void calcQuantity(int i){
    itemQuantity[itemId][1] += (i*sessionQuantity);
    itemQuantity[itemId][2] += (i*sessionQuantity);
    itemQuantity[itemId][0] -= (i*sessionQuantity);
    sesionTotalPrice += (i*sessionQuantity*item_Price_Profit[itemId][0]);
}

void allStocks(){
    int i,choice;
    system(CLS_NAME);
    printf("INVENTORY\n");
    printf("ID  Item                        Qty   Price   Profit\n");
    printf("+----------------------------------------------------+\n");
    for (i=0;i<totalItem;i++){
        if(itemQuantity[i][0]==-1) printf("|%-2d  %-31sITEM HAS BEEN HID|\n",i,itemName[i]);
        else printf("|%-2d  %-28s%3d   %5.2f   %6.2f|\n",i,itemName[i],itemQuantity[i][0],item_Price_Profit[i][0],item_Price_Profit[i][1]);
    }
    printf("+----------------------------------------------------+\n");
    printf("MENU :\n\n    1 - Add Stock\n    2 - Add Item\n    3 - Edit Item\n    4 - hide/Unhide Item\n    5 - Main Menu\n\nPlease select an option : ");
    scanf("%d",&choice);
    choice += 3;
    if(choice>3&&choice<9) menuSelection(choice);
    else allStocks();
}

void addStock(){
    getItemId(5);
    if(itemQuantity[itemId][0]==-1){
        printf("UNHIDE ITEM BEFORE ADD STOCK\n");
        sleep(1);
        allStocks();
    }
    getItemQty();
    itemQuantity[itemId][0] += sessionQuantity;
    allStocks();
}

// Currently problematic
void addStockItem(){
    system(CLS_NAME);
    printf("New Item\n\n");
    printf("New Item Name   : ");
    fflush(stdin);
    scanf(" %[^\n]s",&*itemName[totalItem]);
    //itemName[totalItem][30] = strupr(itemName[totalItem]);
    fflush(stdin);
    printf("New Item Price  : ");
    scanf("%f",&item_Price_Profit[totalItem][0]);
    getNewItemProfit(totalItem);
    printf("New Item Qty    : ");
    scanf("%d",&itemQuantity[totalItem][0]);
    itemQuantity[totalItem][1]=0;
    itemQuantity[totalItem][2]=0;
    ++totalItem;
    allStocks();
}

void getNewItemProfit(int i){
    printf("New Item Profit : ");
    scanf("%f",&item_Price_Profit[i][1]);
    while(item_Price_Profit[i][1]>item_Price_Profit[i][0]/2){
        printf("Profit more than half of item's price. Please reduce!\n    New Item Profit : ");
        scanf("%f",&item_Price_Profit[i][1]);
    }
}

// Currently problematic
void editStockItem(){
    int i;
    system(CLS_NAME);
    printf("Name   : %s\n",itemName[itemId]);
    printf("Price  : %.2f\n",item_Price_Profit[itemId][0]);
    printf("Profit : %.2f\n",item_Price_Profit[itemId][1]);
    printf("Qty    : %d\n",itemQuantity[itemId][0]);
    printf("\nEdit \n\n    1 - Name\n    2 - Price\n    3 - Profit\n    4 - Quantity\n    5 - Back to Stocks\n\nPlease select what to edit: ");
    scanf("%d",&i);
    switch(i){
        case 1  :   printf("New Item Name   : ");
                    fflush(stdin);
                    scanf(" %[^\n]s",&*itemName[itemId]);break;
        case 2  :   printf("New Item Price  : ");
                    scanf("%f",&item_Price_Profit[itemId][0]);break;
        case 3  :   getNewItemProfit(itemId);break;
        case 4  :   printf("New Item Qty    : ");
                    scanf("%d",&itemQuantity[itemId][0]);break;
        case 5  :   allStocks();break;
        default :   break;
    }
    editStockItem();
}

void hideStockItem(){
    if(itemQuantity[itemId][0]!=-1) {
        hiddenItemQuantity[itemId]=itemQuantity[itemId][0];
        itemQuantity[itemId][0]=-1;
    }
    else itemQuantity[itemId][0]=hiddenItemQuantity[itemId];
    allStocks();
}

void getAuth(){
    int i;
    char user[][10]={"manager","134562"},authdummy[10]={};
    system(CLS_NAME);
    printf("USER : ");
    scanf("%s",&*authdummy);
    for(i=0;i<10;i++){
        if(authdummy[i]!=user[0][i]){
            printf("ONLY A MANAGER CAN VIEW THIS PAGE\n");
            sleep(1);
            main();
        }
    }
    printf("PASS : ");
    for(i=0;i<6;i++){
         fflush(stdin);
         // authdummy[i] = getch();
         fflush(stdin);
         if(authdummy[i]=='\n') break;
         printf("*");
    }
    for(i=0;i<6;i++){
        if(authdummy[i]!=user[1][i]){
            printf("\nWRONG PASSWORD\n");
            sleep(1);
            main();
        }
    }
    allStocks();
}