تحديات برمجيةالتحدي الثاني - حل التمرين الخامس بلغة C++

#include <iostream>

int main() {
    double a, b;
    int option = -1;

    std::cout << "Enter first number: ";
    std::cin >> a;

    std::cout << "Enter second number: ";
    std::cin >> b;

    std::cout << (
        "\nWrite down the operation number then press enter\n"
        "0: To end the program.\n"
        "1: To print the sum.\n"
        "2: To print the subtraction.\n"
        "3: To print the multiplication.\n"
        "4: To print the division.");

    while (option != 0)
    {
        std::cout << "\n-------------------------\n";
        std::cout << "Enter option: ";
        std::cin >> option;

        switch (option)
        {
        case 0:
            std::cout << "Program end.";
            break;
        case 1:
            std::cout << a << " + " << b << " = " << (a + b);
            break;
        case 2:
            std::cout << a << " - " << b << " = " << (a - b);
            break;
        case 3:
            std::cout << a << " * " << b << " = " << (a * b);
            break;
        case 4:
            std::cout << a << " / " << b << " = " << (a / b);
            break;
        }
    }

    char end; std::cin >> end;
    return 0;

}