#include <iostream>
using namespace std;

int a, b, z;

int main() {

	cout << "Kalkulator ver. 0.1 alpha" << endl;

	cout << endl;

	cout << "Wpisz pierwsza liczbe: ";
	cin >> a;
	cout << "wpisz druga liczbe: ";
	cin >> b;

	cout << endl;

	cout << "Jakie dzialanie chcialbys wykonac?" << endl;
	cout << "1 = dodawanie" << endl;
	cout << "2 = odejmowanie" << endl;

	cin >> z;
	switch (z)
	{

	case 1:
		cout << a + b;
		break;
	case 2:
		cout << a - b;
		break;
	case '*':
		cout << a*b;
		break;
	case '/':
		cout << a / b;
		break;
	}
	return 0;
}