#include <iostream> using namespace std; class Foo { long x, y; }; int main() { cout << "sizeof(long): " << sizeof(long) << endl; cout << "sizeof(Foo): " << sizeof(Foo) << endl; Foo *qux = new Foo(); Foo *bar = new Foo(); cout << "1st Foo: " << qux << endl; cout << "2nd Foo: " << bar << endl; long diff = ((long)bar)-((long)qux); cout << "Difference: " << diff << endl; delete qux; delete bar; return 0; }