写一个可以用于超市收银系统的C语言程序

#include <stdio.h>
int main() {
int item_code, quantity;
float price, total = 0;
char choice;
printf("Welcome to Supermarket Billing System\n");

do {
printf("Enter Item Code: ");
scanf("%d", &item_code);

printf("Enter Quantity: ");
scanf("%d", &quantity);

switch(item_code) {
case 1:
price = 25.5;
break;
case 2:
price = 15.25;
break;
case 3:
price = 10.5;
break;
case 4:
price = 5.75;
break;
default:
printf("Invalid Item Code\n");
continue;
}

total += price * quantity;

printf("Do you want to add more items? (y/n): ");
scanf(" %c", &choice);

} while(choice == 'y' || choice == 'Y');

printf("Total Bill: Rs. %.2f\n", total);

return 0;

}