C++ da Pointer Kullanımı

//www.ethemsulan.com
#include <cstdlib>
#include <iostream>
using namespace std;
class samp{
      int i;
      public:
             samp(int n){i=n;}
             void seti(int n){i=n;}
             int geti(){return i;}
      };
void sqrit(samp *o){
     o->seti(o->geti()*o->geti());
cout<<"a nin kopyasi su i degerine sahip:"<<o->geti()<<endl;
     }
int main(int argc, char *argv[])
{
    samp ob(10);
    sqrit(&ob);
    cout<<ob.geti()<<endl;
    system("PAUSE");
    return EXIT_SUCCESS;
}