Source Code Aplikasi Penghitung Luas Bangun Datar Sederhana Bahasa C++

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#include <iostream>
using namespace std;

int main() {
    int choice;
    double length, width, height, radius;
    while (true) {
        cout << "Menu:" << endl;
        cout << "1. Luas persegi panjang" << endl;
        cout << "2. Luas lingkaran" << endl;
        cout << "3. Luas segitiga" << endl;
        cout << "4. Keluar" << endl;
        cout << "Pilihan: ";
        cin >> choice;

        if (choice == 1) {
            cout << "Masukkan panjang: ";
            cin >> length;
            cout << "Masukkan lebar: ";
            cin >> width;
            cout << "Luas persegi panjang: " << length * width << endl;
        } else if (choice == 2) {
            cout << "Masukkan jari-jari: ";
            cin >> radius;
            cout << "Luas lingkaran: " << 3.14159 * radius * radius << endl;
        } else if (choice == 3) {
            cout << "Masukkan alas: ";
            cin >> width;
            cout << "Masukkan tinggi: ";
            cin >> height;
            cout << "Luas segitiga: " << 0.5 * width * height << endl;
        } else if (choice == 4) {
            break;
        } else {
            cout << "Pilihan tidak valid." << endl;
        }
    }
    return 0;
}