#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;
}