Answer to Question #156146 in C++ for zamin

Question

In this program, we will display a menu to the user. The user can choose any option from the given menu. The

menu would be something like this:

Welcome to the World of Control Structures

• Press (A) to add two integers

• Press (S) to subtract two integers

• Press (M) to multiply two integers

• Press (E) to exit the program

Answer 1

#include <iostream>

void PrintMenu()
{
    std::cout << "Welcome to the World of Control Structures\n";
    std::cout << "- Press (A) to add two integers\n";
    std::cout << "- Press (S) to subtract two integers\n";
    std::cout << "- Press (M) to multiply two integers\n";
    std::cout << "- Press (E) to exit the program\n";
}

int main()
{
    while(true)
    {
        PrintMenu();

        char operation;
        std::cin >> operation;

        if(operation != 'A' && operation != 'S' && operation != 'M' && operation != 'E')
        {
            std::cout << "Unexpected input. Try again\n\n";
            continue;
        }

        if(operation == 'E')
        {
            break;
        }

        int number1, number2;
        std::cout << "Enter two numbers: ";
        std::cin >> number1 >> number2;

        if(!std::cin)
        {
            std::cout << "Bad input. Exit program\n";
            return 1;
        }
        
        switch(operation)
        {
            case 'A' : std::cout << number1 << " + " << number2 << " = " << number1 + number2; break;
            case 'S' : std::cout << number1 << " - " << number2 << " = " << number1 - number2; break;
            case 'M' : std::cout << number1 << " * " << number2 << " = " << number1 * number2; break;
        }

        std::cout << "\n\n";
    }

    return 0;
}