main.cpp

#include <iostream>
using namespace std;

// simple menu item
struct Food { int id; string name; string type; int price; };
// order record
struct Order { int id; string customer; int total; string status; };

// menu items
Food menu[13] = {
    {1,"Pizza","Main Dish",320},
    {2,"ingera","Main Dish",100},
    {3,"burger","Main Dish",200},
    {4,"Chicken","Main Dish",120},
    {5,"egg","Main Dish",90},
    {6,"juice","Side",50},
    {7,"firfr","Side",60},
    {8,"bread","Side",50},
    {9,"Salad","Side",80},
    {10,"Fanta","Drink",60},
    {11,"Orange","Drink",50},
    {12,"Chocolate","additional",70},
    {13,"Water","Drink",40}
};

Order orders[20];      // store orders here
int orderCount = 0,
    nextId = 1001;    // starting order id

// show the menu to the user
void showMenu() {
    cout << "\n======== MENU ========\n";
    for(int i = 0; i < 13; i++)
        cout << menu[i].id << ". " << menu[i].name
             << " (" << menu[i].type << ") - " << menu[i].price << " ETB\n";
}

// take a new order from a customer
void takeOrder() {
    string name;
    cout << "\nCustomer Name: ";
    cin.ignore();                 // clear leftover newline
    getline(cin, name);           // read full name (spaces allowed)

    Order o; o.id = nextId++; o.customer = name; o.total = 0; o.status = "Pending";

    char more = 'y';
    while(more == 'y') {
        showMenu();
        int choice, qty;
        cout << "Item (1-13, 0=stop): "; cin >> choice;
        if(choice == 0) break;
        if(choice < 1 || choice > 13) { cout << "Invalid!\n"; continue; }
        cout << "Quantity: "; cin >> qty;
        o.total += menu[choice - 1].price * qty;
        cout << "Added " << qty << "x " << menu[choice - 1].name << "\n";
        cout << "Add more? (y/n): "; cin >> more;
    }

    if(o.total > 0) {
        orders[orderCount] = o; orderCount++;
        cout << "\nOrder #" << o.id << " created! Total: " << o.total << " ETB\n";
    } else {
        cout << "Order cancelled!\n";
        nextId--;                  // rollback id when no items were ordered
    }
}

// list all orders
void showOrders() {
    if(orderCount == 0) { cout << "\nNo orders!\n"; return; }
    cout << "\n===== ORDERS =====\n";
    for(int i = 0; i < orderCount; i++)
        cout << "#" << orders[i].id << " - " << orders[i].customer
             << " - " << orders[i].total << " ETB - " << orders[i].status << "\n";
}

// update an order's status
void updateStatus() {
    if(orderCount == 0) { cout << "\nNo orders!\n"; return; }
    showOrders();
    int id; cout << "\nOrder ID: "; cin >> id;
    for(int i = 0; i < orderCount; i++) {
        if(orders[i].id == id) {
            cout << "1.Preparing 2.Ready 3.Completed: ";
            int c; cin >> c;
            if(c == 1) orders[i].status = "Preparing";
            else if(c == 2) orders[i].status = "Ready";
            else if(c == 3) orders[i].status = "Completed";
            else { cout << "Invalid!\n"; return; }
            cout << "Status updated!\n";
            return;
        }
    }
    cout << "Order not found!\n";
}

// print bill for a ready/completed order
void generateBill() {
    if(orderCount == 0) { cout << "\nNo orders!\n"; return; }
    showOrders();
    int id; cout << "\nOrder ID: "; cin >> id;
    for(int i = 0; i < orderCount; i++) {
        if(orders[i].id == id) {
            if(orders[i].status == "Ready" || orders[i].status == "Completed") {
                cout << "\n===== BILL =====\nOrder #" << orders[i].id
                     << "\nCustomer: " << orders[i].customer
                     << "\nTotal: " << orders[i].total << " ETB"
                     << "\nStatus: " << orders[i].status
                     << "\n================\nThank you!\n";
            } else {
                cout << "Order not ready! Status: " << orders[i].status << "\n";
            }
            return;
        }
    }
    cout << "Order not found!\n";
}

int main() {
    while(1) {
        cout << "\n===== RESTAURANT SYSTEM =====\n"
             << "1. View Menu\n2. Take Order\n3. View Orders\n"
             << "4. Update Status\n5. Generate Bill\n6. Exit\n"
             << "Choice (1-6): ";
        int c; cin >> c;

        if(c == 1) showMenu();
        else if(c == 2) takeOrder();
        else if(c == 3) showOrders();
        else if(c == 4) updateStatus();
        else if(c == 5) generateBill();
        else if(c == 6) { cout << "Goodbye!\n"; break; }
        else cout << "Invalid choice!\n";

        cout << "\nPress Enter...";
        cin.ignore();            // wait for user to press Enter
        cin.get();
        system("cls||clear");    // clear screen (Windows/Linux)
    }
    return 0;
}