Ćwiczenie 1

#include <iostream>

void f(int &x, double  y, int z, const int &a){
    std::cout<<x<<y<<z<<a<<std::endl;
    x=x*2;
    std::cout<<x<<y<<z<<a<<std::endl;
    y++;
    std::cout<<x<<y<<z<<a<<std::endl;
}

int main()
{
    int x = 6;
    f(x,x,x,x);
    return 0;
}