Call min() with special comparison function : min « STL Algorithms Min Max « C++





Call min() with special comparison function

  
 

/* The following code example is taken from the book
 * "The C++ Standard Library - A Tutorial and Reference"
 * by Nicolai M. Josuttis, Addison-Wesley, 1999
 *
 * (C) Copyright Nicolai M. Josuttis 1999.
 * Permission to copy, use, modify, sell and distribute this software
 * is granted provided this copyright notice appears in all copies.
 * This software is provided "as is" without express or implied
 * warranty, and with no claim as to its suitability for any purpose.
 */
#include <algorithm>
#include <iostream>

using namespace std;

/* function that compares two pointers by comparing the values to which they po
int
 */
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* pmin;

    // call min() with special comparison function
    pmin = min (px, py, int_ptr_less);
    cout << *pmin;
    //...
}

 /* 
17
 */       
    
  










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