Paren neparen

The code prints the following:

vnesi za a: 0 vnesi za b: 1 vnesi za y: 2

#include <iostream>
using namespace std;

int main()
{

  int a,b,y;
  cout << "vnesi za a: ";
  cin >> a;
  cout << "vnesi za b: ";
  cin >> b;
  if ((a % 2) != 0)
  {
    y = a + b;
    cout << y;
  }
  else
  {
    y = a - b;
    cout << y;
  }
  return 0;
}