Exercise of i++ vs ++i

exercise:

#include <cstdlib>
#include <iostream>

using namespace std;

int main(int argc, char *argv[])
{
  int i;

  cout << "Test on i++ \n";
  i = 0;
  cout << i++ << "\n\n";

  while(i++ <= 10){
        cout << i << "\n";
        }
      
  cout << "\n";
  cout << "Test on ++i \n";
  i = 0;
  cout << ++i << "\n\n";

  while(++i <= 10){
        cout << i << "\n";
        }

  system("PAUSE");
  return EXIT_SUCCESS;
}