restaurant.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[50];
};




//functions to generate bills
void generateBillHeader(char name[50],char date[30]){
printf("\n\n");
printf("\t      MHZ.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 dis=0.1*total;
float netTotal=total-dis;
float cgst=0.09*netTotal,grandTotal=netTotal+2*cgst;
printf("------------------------------------------------\n");
printf("SubTotal\t\t\t %.2f ",total);
printf("\nDiscount @10%s\t\t\t%.2f","%",dis );
printf("\n\t\t\t\t------");
printf("\nNetTotal\t\t\t%.2f",netTotal );
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()
{
    float total;
    int opt,n,numofitems;                           //ye check kerna hai
    struct orders ord;
    struct orders order;
    char savebill='y',contFlag='y';
    char name[50];
    FILE *fp;
    //dashboard
    while(contFlag=='y'){
    float total=0;
    int invoicefound=0;
    printf("\t============MHZ . RETSARAUNT============");
    printf("\n\n Please select your desired operation:");
    printf("\n\n1.Generate Invoice");
    printf("\n2.Show all Invoices");
    printf("\n3.Search Invoices");
    printf("\n4.Exit");

    printf("\n\nYour choice:");
    scanf("%d",&opt);
    printf("\nYou have chosen %d:",opt);
    fgetc(stdin);
    switch (opt){
        case 1:

            printf("\n\nPlease Enter the name of costumer:\t");
            fgets(ord.customer,50,stdin);
            ord.customer[strlen(ord.customer)-1]=0;
            strcpy(ord.date,__DATE__);
            printf("\n\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("\n Do 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("\n Error Saving");
 fclose(fp);
 }

 break;
 case 2:

 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;
 case 3:
 printf("\nEnter the name of the customer:\t");
// fgetc(stdin);
 fgets(name,50,stdin);
 name [strlen(name)-1]=0;
 system("clear");
 fp=fopen("RestaurantBill.dat","r");
 printf("\t*****INVOICE OF %s*****\n",name);
 while(fread(&order,sizeof(struct orders),1,fp)){
        float tot=0;
    if(!strcmp(order.customer,name)){
       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);
    invoicefound=1;
    }

 }
 if(!invoicefound){
    printf("Sorry the invoice for %s does not exists ",name);
 }
fclose(fp);
break;
 case 4:
    printf("\n\t\t BYE BYE:)\n\n");
    exit(0);
    break;
 default:
    printf("Sorry Invalid Option");
    break;





    }
    printf("Do you want to perform another operation?[y/n]:\t");
    scanf("%s",&contFlag);
}
printf("\n\t\t BYE BYE:)\n\n");
printf("\n\n");
   return 0;

    }