#include <iostream>

using namespace std;

int main ()
{
    int chislo1;
    cout << "Vvedit chislo 1: ";
    cin >> chislo1;

    int chislo2;
    cout << "Vvedit chislo 2: ";
    cin >> chislo2;

    int act;
    cout << "Enter act (1 - +, 2 - -, 3 - *, 4 - /): ";
    cin >> act;

    switch (act)
    {
        case 1: cout << chislo1 + chislo2; break;
        case 2: cout << chislo1 - chislo2; break;
        case 3: cout << chislo1 * chislo2; break;
        case 4: cout << chislo1 / chislo2; break;
        default: cout << "Action not supported!";
    }
}