#include <iostream>

using namespace std;

double sum(double num1,double num2)
{
    return num1 + num2;
}

double subtract(double num1, double num2)
{
    return num1 - num2;
}

double multiply(double num1, double num2)
{
    return num1 * num2;
}

double devide(double num1, double num2)
{
    return num1 / num2;
}


int main()
{
    double num1,num2;

    cout << "Hello calculator user!" << endl;
    cout << "Please enter 2 numbers" << endl;

    cin >> num1;
    cin >> num2;

    cout << "Please select an option: " << endl;
    cout << "Plus numbers (+)"<< endl;
    cout << "Minus numbers (-)"<< endl;
    cout << "Multiply numbers (*)"<< endl;
    cout << "Divide numbers (/)"<< endl;
    cout << endl;


    char selection;
    cin >> selection;

    switch(selection)
    {
    case '+':
        cout << "Answer: " << sum(num1,num2) << endl;
        break;
    case '-':
        cout << "Answer: " << subtract(num1,num2) << endl;
        break;
    case '*':
        cout << "Answer: " << multiply(num1,num2) << endl;
        break;
    case '/':
        cout << "Answer: " << devide(num1,num2) << endl;
        break;
    }

    return 0;
}