#include
#include
using namespace std;
bool int_ptr_less (int* a, int* b)
{
return *a < *b;
}
int main()
{
int x = 17;
int y = 42;
int* px = &x;
int* py = &y;
int* pmax;
// call max() with special comparison function
pmax = max_element (px, py, int_ptr_less);
cout << *pmax;
//...
}