C++ Pointer Boyu sizeof() Metodu Ile Bulma

//www.ethemsulan.com
#include <cstdlib>
#include <iostream>
using namespace std;
int main(int argc, char *argv[])
{
    float *pt1;
    double *pt2;
    int *pt3;
    cout<<sizeof(pt1)<<endl<<sizeof(pt2)<<endl<<sizeof(pt3)<<endl;
    system("PAUSE");
    return EXIT_SUCCESS;
}