map 取最大value-白红宇

map 取最大value

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发布时间：2019-06-22

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map 取最大value

源码：

/* * ===================================================================================== * *       Filename:  max.cc * *    Description:   * *        Version:  1.0 *        Created:  04/09/2012 12:57:56 PM *       Revision:  none *       Compiler:  gcc * *         Author:  kangle.wang (mn), wangkangluo1@gmail.com *        Company:  APE-TECH * * ===================================================================================== */#include 
     
      #include 
      #include 
       
        using namespace std;template
        
         bool pairCompare(const T & x, const T & y){  return x.second < y.second;}template
         
          typename T::const_iterator map_max_element(const T &A){    typedef typename T::value_type pair_type;    return max_element(A.begin(), A.end(), pairCompare
          
           );}int main(){ map
           
             A; map
            
             ::const_iterator it; // Data insert A.insert ( pair
             
              ( -2, 1) ); A.insert ( pair
              
               ( 0, 5) ); A.insert ( pair
               
                ( 2, -5) ); it = map_max_element(A); cout << "Row with maximum second element of a Map: " << (*it).first << " , " << (*it).second << endl; return 0;}