#include <iostream>

using namespace std;

void zamiana(int& a, int& b)
{
    int c = a;
    a = b;
    b = c;
}

int main()
{
    int a = 7;
    int b = 10;
    zamiana(a, b);

    cout << "a = " << a << endl;
    cout << "b = " << b << endl;
    return 0;
}