The following code example is taken from the book
The C++ Standard Library - A Tutorial and Reference
by Nicolai M. Josuttis, Addison-Wesley, 1999
© Copyright Nicolai M. Josuttis 1999
#include <algorithm>
using namespace std;
/* function that compares two pointers by comparing the values to which they point
*/
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 (px, py, int_ptr_less);
//...
}