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

int main()
{

    FILE *fp;

    int n,p,num,ch;
    char ope;

    char s[25],str[100][20];
    int price[100];

    do
    {
        printf("\t\t\t\t\t\t\t   TAJAMHAL FOOD\t\t\n");
        printf("Press 1 to entry item and Further process\nPress 2 to show item and Further process\n");

        scanf("%d",&ch);
        printf("\n\n");
        switch(ch)
        {
        case 1:
        {
            fp=fopen("input.txt","w");
            if(fp==NULL)
            {
                printf("Error!! Opening FIle\n");
                return 1;
            }

            printf("Enter The Total Number of Items: \n");
            scanf("%d",&n);
            fprintf(fp, "%d\n", n);
            printf("Enter Item Name & Price: \n");
            for(int i=1; i<=n; ++i)
            {
                scanf("%s %d",s, &p);
                fprintf(fp, "%s %d\n", s,p);
            }
            fclose(fp);

        }

        case 2:
        {
            fp=fopen("input.txt","r");

            rewind(fp);
            fscanf(fp, "%d", &num);


            for(int i=1; i<=num; ++i)
            {
                fscanf(fp, "%s %d",str[i],&price[i]);
            }
            fclose(fp);


    printf("\n\t\t\t\t\t\t\t    Cash Memo\t\t\n");
    printf("\t\t\t\t\t\t*********************************\t\t\n");
            for(int i=1; i<=num; ++i)
            {
                printf("\t\t\t\t\t%d. %s = %d\n", i, str[i], price[i]);
            }
        }
        printf("\n\n");
        }


        printf("Press 0 to End: \n");
        int idx[25], quantity[25], total = 0, id;
        for(id=1;;++id) {
            scanf("%d",&idx[id]);
            if(idx[id]==0) break;
            scanf("%d",&quantity[id]);
            total += price[idx[id]] * quantity[id];
        }

        for(int j=1;j<id;++j) {
            printf("%d %s %d %d\n", j, str[idx[j]], quantity[j], price[idx[j]] * quantity[j]);
        }
        printf("\n\n\n\tTotal money: %d\n", total);

        printf("\n\n\nDo You Want to Continue?\nPress y to Continue.\nAny other key to exit.\n");
        getchar();
        ope=getchar();
        system("cls");
    }
    while(ope=='y');


    return 0;
}