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Function

CGAL::min_max_element

Definition

The function min_max_element computes the minimal and the maximal element of a range. It is modeled after the STL functions min_element and max_element. The advantage of min_max_element compared to calling both STL functions is that one only iterates once over the sequence. This is more efficient especially for large and/or complex sequences.

#include <CGAL/algorithm.h>

template < class ForwardIterator >
std::pair< ForwardIterator, ForwardIterator >
min_max_element ( ForwardIterator first, ForwardIterator last)
returns a pair of iterators where the first component refers to the minimal and the second component refers to the maximal element in the range [first, last). The ordering is defined by operator< on the value type of ForwardIterator.

template < class ForwardIterator, class CompareMin, class CompareMax >
std::pair< ForwardIterator, ForwardIterator >
min_max_element ( ForwardIterator first,
ForwardIterator last,
CompareMin comp_min,
CompareMax comp_max)
returns a pair of iterators where the first component refers to the minimal and the second component refers to the maximal element in the range [first, last).
Requirement: CompareMin and CompareMax are adaptable binary function objects: VT  ×  VT  →  bool where VT is the value type of ForwardIterator.

Example

The following example program computes the minimal and maximal element of the sequence (3, 6, 5). Hence the output is min = 3, max = 6. 

File: examples/STL_Extension/min_max_element_example.cpp

#include <CGAL/algorithm.h>
#include <vector>
#include <iostream>

using std::vector;
using std::pair;
using std::cout;
using std::endl;
using CGAL::min_max_element;

int main()
{
  vector< int > v;
  v.push_back(3);
  v.push_back(6);
  v.push_back(5);
  typedef std::vector< int >::iterator iterator;
  pair< iterator, iterator > p = min_max_element(v.begin(), v.end());
  cout << "min = " << *p.first << ", max = " << *p.second << endl;
  return 0;
}

Next: Dispatch_output_iterator<V,O>
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CGAL Open Source Project. Release 4.1. 23 October 2012.