#include <iostream>

using namespace std;


void smeni(int &a, int &b) {
    int tmp_a = a;
    a = b;
    b = tmp_a;
}
void x(int &a) {
    a++;
}
int main()
{
    int number = 10;
    x(number);
    cout << number << endl;
    // swap values
    int a = 5;
    int b = 6;

    smeni(a, b); // smeni ja vrednosta na a i b
    cout << a << " " << b << endl;
    // sakam da mi pecati 6 5
    return 0;
}