Cafe Mangagement System in C

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

#define MAX_ITEMS 50
#define MAX_ORDERS 100

struct MenuItem {
    int id;
    char name[50];
    float price;
    int quantity;
};

struct Order {
    int order_id;
    int item_id;
    int quantity;
    float total;
};

struct MenuItem menu[MAX_ITEMS];
struct Order orders[MAX_ORDERS];
int item_count = 0;
int order_count = 0;

void addMenuItem() {
    if(item_count >= MAX_ITEMS) {
        printf("Menu is full!\n");
        return;
    }
    
    printf("\n=== Add New Menu Item ===\n");
    menu[item_count].id = item_count + 1;
    
    printf("Enter item name: ");
    scanf(" %[^\n]", menu[item_count].name);
    
    printf("Enter price: ");
    scanf("%f", &menu[item_count].price);
    
    printf("Enter available quantity: ");
    scanf("%d", &menu[item_count].quantity);
    
    printf("Item added successfully! ID: %d\n", menu[item_count].id);
    item_count++;
}

void displayMenu() {
    printf("\n=== Cafe Menu ===\n");
    printf("ID\tName\t\tPrice\tQuantity\n");
    printf("--------------------------------\n");
    
    for(int i = 0; i < item_count; i++) {
        printf("%d\t%-15s\t%.2f\t%d\n", 
               menu[i].id, 
               menu[i].name, 
               menu[i].price, 
               menu[i].quantity);
    }
}

void takeOrder() {
    if(item_count == 0) {
        printf("No items in menu!\n");
        return;
    }
    
    printf("\n=== Take New Order ===\n");
    displayMenu();
    
    int item_id, quantity;
    printf("\nEnter Item ID: ");
    scanf("%d", &item_id);
    
    if(item_id < 1 || item_id > item_count) {
        printf("Invalid Item ID!\n");
        return;
    }
    
    printf("Enter quantity: ");
    scanf("%d", &quantity);
    
    if(quantity > menu[item_id-1].quantity) {
        printf("Not enough quantity available!\n");
        return;
    }
    
    // Create order
    orders[order_count].order_id = order_count + 1;
    orders[order_count].item_id = item_id;
    orders[order_count].quantity = quantity;
    orders[order_count].total = menu[item_id-1].price * quantity;
    
    // Update stock
    menu[item_id-1].quantity -= quantity;
    
    printf("Order placed successfully! Order ID: %d\n", orders[order_count].order_id);
    printf("Total amount: %.2f\n", orders[order_count].total);
    order_count++;
}

void generateBill() {
    if(order_count == 0) {
        printf("No orders found!\n");
        return;
    }
    
    int order_id;
    printf("\nEnter Order ID to generate bill: ");
    scanf("%d", &order_id);
    
    if(order_id < 1 || order_id > order_count) {
        printf("Invalid Order ID!\n");
        return;
    }
    
    struct Order order = orders[order_id-1];
    struct MenuItem item = menu[order.item_id-1];
    
    printf("\n=== Bill ===\n");
    printf("Order ID: %d\n", order.order_id);
    printf("Item: %s\n", item.name);
    printf("Quantity: %d\n", order.quantity);
    printf("Price per item: %.2f\n", item.price);
    printf("Total amount: %.2f\n", order.total);
    printf("Thank you for your order!\n");
}

void salesReport() {
    printf("\n=== Sales Report ===\n");
    printf("Total orders: %d\n", order_count);
    
    float total_revenue = 0;
    for(int i = 0; i < order_count; i++) {
        total_revenue += orders[i].total;
    }
    printf("Total revenue: %.2f\n", total_revenue);
}

int main() {
    int choice;
    
    printf("=== Welcome to Cafe Management System ===\n");
    
    do {
        printf("\n1. Add Menu Item\n");
        printf("2. Display Menu\n");
        printf("3. Take Order\n");
        printf("4. Generate Bill\n");
        printf("5. Sales Report\n");
        printf("6. Exit\n");
        printf("Enter your choice: ");
        scanf("%d", &choice);
        
        switch(choice) {
            case 1:
                addMenuItem();
                break;
            case 2:
                displayMenu();
                break;
            case 3:
                takeOrder();
                break;
            case 4:
                generateBill();
                break;
            case 5:
                salesReport();
                break;
            case 6:
                printf("Thank you for using Cafe Management System!\n");
                break;
            default:
                printf("Invalid choice! Please try again.\n");
        }
    } while(choice != 6);
    
    return 0;
}