3.7

#include <iostream>

using namespace std;

int a, b;

void input() {
    cout << "Enter a: ";
    cin >> a;
    cout << "Enter b: ";
    cin >> b;
}

void arithmometer(int a, int b) {
    if (a == 0 & b == 0) {
        exit(0);
    } else {
        cout << a * b << endl;
    }
}

int main() {

    while (true) {
        input();
        arithmometer(a, b);
    }
}