Predicate Version of max_element

在 Visual C++ 演示如何使用 max_element 标准模板库函数的 (STL)谓词版本。

template<class InputIterator, class Compare> inline
   InputIterator max_element(
      InputIterator First,
      InputIterator Last,
      Compare Compare
   )

备注

备注

类/参数名在原型不匹配版本在头文件。修改某些提高可读性。

max_element 算法返回最大元素的位置在序列 [First， Last)。 max_element 的谓词版本用于比较 比较 功能。

示例

// max_elementPV.cpp
// compile with: /EHsc
// Illustrates how to use the predicates version
// of the max_element function.
//
// Functions:
//    max_element : Return the maximum element within a range.

// disable warning C4786: symbol greater than 255 character,
// okay to ignore
#pragma warning(disable: 4786)

#include <iostream>
#include <algorithm>
#include <functional>
#include <vector>

using namespace std;


int main()
{
    const int VECTOR_SIZE = 8 ;

    // Define a template class vector of int
    typedef vector<int > IntVector ;

    //Define an iterator for template class vector of strings
    typedef IntVector::iterator IntVectorIt ;

    IntVector Numbers(VECTOR_SIZE) ;

    IntVectorIt start, end, it, location ;

    // Initialize vector Numbers
    Numbers[0] = 4 ;
    Numbers[1] = 10;
    Numbers[2] = 10 ;
    Numbers[3] = 30 ;
    Numbers[4] = 69 ;
    Numbers[5] = 70 ;
    Numbers[6] = 96 ;
    Numbers[7] = 100;

    start = Numbers.begin() ;   // location of first
                                // element of Numbers

    end = Numbers.end() ;       // one past the location
                                // last element of Numbers

    // print content of Numbers
    cout << "Numbers { " ;
    for(it = start; it != end; it++)
        cout << *it << " " ;
    cout << " }\n" << endl ;

    // return the maximum element in the Numbers
    location = max_element(start, end, less<int>()) ;

    cout << "The maximum element in Numbers is: "
        << *location << endl ;
}

Output

Numbers { 4 10 10 30 69 70 96 100  }

The maximum element in Numbers is: 100

要求

**标题:**algorithm

请参见

概念

标准模板库示例