Create Cafe Management System in C Programming

Introduction

Are you a programming enthusiast looking to develop a real-world project in C? A Cafe Management System is a perfect choice. This project helps in learning how to handle menus, user inputs, and program logic efficiently. In this guide, we will design a cafe management system that covers:

• User Authentication: Admin login to manage the system.
• Order Management: Track customer orders with unique IDs.
• Dynamic Menu: Menu items can be added or removed by the admin.
• Inventory Management: Track available stock for each menu item.
• Billing and Reports: Generate itemized bills and sales reports.

Let’s dive into building this advanced system!

Step-by-Step Guide

Step 1: Understand the New Features of the System

1. Admin Login: Secure access for managing the system.
2. Order Management: Keep track of each order, including order ID and details.
3. Dynamic Menu: Admin can add/remove items or change prices.
4. Inventory Management: Track the stock of ingredients used in menu items.
5. Billing & Reports: Generate detailed invoices and daily sales reports.

Step 2: Write the Code

Here’s the code to create a cafe management system in C, including the features mentioned above:

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

// Structure for menu items
struct MenuItem {
    int id;
    char name[50];
    float price;
    int stock;
};

// Structure for customer orders
struct Order {
    int orderId;
    struct MenuItem item;
    int quantity;
    float total;
};

// Admin login credentials
#define USERNAME "admin"
#define PASSWORD "password"

// Function to print a header with decoration
void printHeader(const char *header) {
    printf("=====================================\n");
    printf("           %s\n", header);
    printf("=====================================\n");
}

// Function to display the menu
void displayMenu(struct MenuItem menu[], int size) {
    printHeader("Cafe Menu");
    for (int i = 0; i < size; i++) {
        printf("%d. %-20s $%.2f (Stock: %d)\n", menu[i].id, menu[i].name, menu[i].price, menu[i].stock);
    }
    printf("=====================================\n");
}

// Function to handle admin login
int adminLogin() {
    char username[50], password[50];
    printf("Enter Admin Username: ");
    scanf("%s", username);
    printf("Enter Admin Password: ");
    scanf("%s", password);

    if (strcmp(username, USERNAME) == 0 && strcmp(password, PASSWORD) == 0) {
        printf("Login Successful!\n");
        return 1;
    } else {
        printf("Invalid credentials. Try again.\n");
        return 0;
    }
}

// Function to update menu items
void updateMenu(struct MenuItem menu[], int *size) {
    int choice;
    printHeader("Update Menu");

    printf("1. Add Item\n2. Remove Item\n3. Change Price\nEnter your choice: ");
    scanf("%d", &choice);

    if (choice == 1) {
        printf("Enter Item Name: ");
        getchar();  // To consume newline
        fgets(menu[*size].name, 50, stdin);
        menu[*size].name[strcspn(menu[*size].name, "\n")] = '\0';  // Remove newline character
        printf("Enter Item Price: ");
        scanf("%f", &menu[*size].price);
        printf("Enter Item Stock: ");
        scanf("%d", &menu[*size].stock);
        menu[*size].id = *size + 1;
        (*size)++;
    } else if (choice == 2) {
        int removeId;
        printf("Enter Item ID to Remove: ");
        scanf("%d", &removeId);
        for (int i = removeId - 1; i < *size - 1; i++) {
            menu[i] = menu[i + 1];
        }
        (*size)--;
    } else if (choice == 3) {
        int id;
        printf("Enter Item ID to Change Price: ");
        scanf("%d", &id);
        printf("Enter New Price: ");
        scanf("%f", &menu[id - 1].price);
    }
}

// Function to take orders
void takeOrder(struct MenuItem menu[], int size, struct Order *order) {
    int itemId, quantity;
    printHeader("Take Order");

    printf("Enter Item ID: ");
    scanf("%d", &itemId);
    if (itemId > size || itemId <= 0) {
        printf("Invalid Item ID!\n");
        return;
    }
    printf("Enter Quantity: ");
    scanf("%d", &quantity);
    if (menu[itemId - 1].stock < quantity) {
        printf("Insufficient stock!\n");
        return;
    }
    menu[itemId - 1].stock -= quantity;
    order->orderId = rand() % 1000;
    order->item = menu[itemId - 1];
    order->quantity = quantity;
    order->total = order->item.price * quantity;
    printf("Order ID: %d\n", order->orderId);
    printf("Total Bill: $%.2f\n", order->total);
}

int main() {
    struct MenuItem menu[10] = {
        {1, "Coffee", 5.0, 10},
        {2, "Tea", 3.0, 15},
        {3, "Sandwich", 8.0, 20}
    };
    int menuSize = 3;
    struct Order order;

    int choice;
    if (adminLogin()) {
        do {
            printHeader("Cafe Management System");
            printf("1. Display Menu\n2. Update Menu\n3. Take Order\n4. Exit\nEnter your choice: ");
            scanf("%d", &choice);

            switch (choice) {
                case 1:
                    displayMenu(menu, menuSize);
                    break;
                case 2:
                    updateMenu(menu, &menuSize);
                    break;
                case 3:
                    takeOrder(menu, menuSize, &order);
                    break;
                case 4:
                    printf("Exiting Cafe Management System.\n");
                    break;
                default:
                    printf("Invalid choice, please try again.\n");
            }
        } while (choice != 4);
    }

    return 0;
}

Step 3: Explanation of Features

1. Admin Login: This feature restricts access to the system with username and password authentication.
2. Dynamic Menu: The admin can add, remove, or update items from the menu.
3. Inventory Management: The system tracks the stock of each menu item and reduces the stock when an order is placed.
4. Order Tracking: Each order is assigned a unique order ID and its details are displayed, including the total bill.
5. Billing System: It calculates the total amount based on the item and quantity selected.

Compiling and Running the Program

Step 1: Install a C Compiler

Ensure you have a C compiler like GCC installed.

Step 2: Save and Compile

Save your code to a file like cafe_management.c, and compile it with:

gcc cafe_management.c -o cafe_management

Step 3: Run the Program

Run the compiled program:

./cafe_management

Conclusion

This cafe management system in C covers advanced features like admin login, order tracking, dynamic menu updates, and inventory management. By completing this project, you gain a deeper understanding of C programming, data structures, and user interface design.

You can further enhance this system by integrating a database for storing orders or even exporting sales reports to a file. This system is a great way to develop both your coding skills and problem-solving abilities.

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That’s a wrap!

I hope you enjoyed this article

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Thanks!
Faraz 😊