restaurent.c

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

struct items{
    char item[20];
    float price;
    int qty;
};

struct orders{
    char customer[50];
    char date[50];
    int numOfItems;
    struct items itm[200]
};

//function to generate bills
void generateBillHeader(char name[50],char date[30]){
    printf("\n\n");
        printf("\t    ADV . Restaurant");
        printf("\n\t   ------------------");
        printf("\nDate:%s",date);
        printf("\nInvoice to: %s",name);
        printf("\n");
        printf("-------------------------------------------\n");
        printf("Items\t\t");
        printf("Qty\t\t");
        printf("Total\t\t");
        printf("\n-------------------------------------------");
        printf("\n\n");

}

void generateBillBody(char item[30], int qty, float price){
    printf("%s\t\t",item);
        printf("%d\t\t",qty);
        printf("%.2f\t\t",qty * price);
        printf("\n");
}

void generateBillFooter(float total){
    printf("\n");
    float cgst=0.09*total,grandTotal=total + 2*cgst;
    printf("---------------------------------------\n");
    printf("\nCGST @9%s\t\t\t%.2f","%",cgst);
    printf("\nSGST @9%s\t\t\t%.2f","%",cgst);
    printf("\n---------------------------------------");
    printf("\nGrand Total\t\t\t%.2f",grandTotal);
    printf("\n---------------------------------------");

}

int main(){

    int opt, n;
    float total;
    char saveBill = 'y';
    FILE * fp;
    struct orders ord;
    struct orders order;
    //dashboard
    printf("\t===========ADV. RESTAURANT===========");
    printf("\n\nPlease select your preference:\t");
    printf("\n\n1. Generate Invoice");
    printf("\n2. Show all Invoices");
    printf("\n3. Search Invoice");
    printf("\n4. Exit");

    printf("\n\nYour Choice:\t");
    scanf("%d",&opt);
    fgetc(stdin);


    switch(opt){
        case 1:
        system("cls");
        printf("\nPlease enter the name of the customer:\t");
        fgets(ord.customer,200,stdin);
        ord.customer[strlen(ord.customer)-1] = 0;
        strcpy(ord.date,__DATE__);
        printf("\nPlease enter the number of items:\t");
        scanf("%d",&n);
        ord.numOfItems = n;

        for(int i=0;i<n;i++){
            fgetc(stdin);
            printf("\n\n");
            printf("Please enter the item %d:\t",i+1);
            fgets(ord.itm[i].item,20,stdin);
            ord.itm[i].item[strlen(ord.itm[i].item)-1] = 0;
            printf("Please enter the quantity:\t");
            scanf("%d",&ord.itm[i].qty);
            printf("Please enter the unit price:\t");
            scanf("%f",&ord.itm[i].price);
            total += ord.itm[i].qty * ord.itm[i].price;
        }

        generateBillHeader(ord.customer,ord.date);
        for(int i=0;i<ord.numOfItems;i++){
            generateBillBody(ord.itm[i].item,ord.itm[i].qty,ord.itm[i].price);

        }
        generateBillFooter(total);

        printf("\nDo you want to save the invoice [y/n]:\t");
        scanf("%s",&saveBill);


        if(saveBill == 'y'){
            fp = fopen("RestaurantBill.dat","a+");
            fwrite(&ord,sizeof(struct orders),1,fp);
            if(fwrite != 0)
            printf("\nSuccessfully Saved");
            else
            printf("\nError");
            fclose(fp);
        }
        break;

        case 2:
        system("cls");
        fp = fopen("RestaurantBill.dat","r");
        printf("\n  *****Your Previous Invoices*****\n");
        while(fread(&order,sizeof(struct orders),1,fp)){
            float tot = 0;
            generateBillHeader(order.customer,order.date);
            for(int i=0;i<order.numOfItems;i++){
                generateBillBody(order.itm[i].item,order.itm[i].qty,order.itm[i].price);
                tot+=order.itm[i].qty * order.itm[i].price;
            }
            generateBillFooter(tot);
        }
        fclose(fp);
        break;

    }

    printf("\n\n");

     return 0;
}