#include <iostream>

using namespace std;

int main()
{
    int wybor;
    cout << "[1] dodawanie" << endl;
    cout << "[2] odejmowanie" << endl;
    cout << "[3] mnozenie" << endl;
    cout << "[4] dzielenie" << endl;
    cout << "[5] rezygnuj" << endl;
    cin >> wybor;

    double a, b;
    cout << "Podaj dwie liczby rzeczywiste: ";
    cin >> a >> b;
    switch(wybor)
    {
    case 1:
        cout << a << " + " << b << " = " << a + b << endl;
    case 2:

    case 3:

    case 4:

    case 5:

    }
    return 0;
}