chapter10-38.cpp

C++STL程序员开发指南

//文件名:CHAPTER10-38.cpp
#include <map>
#include <iostream>
#if _MSC_VER > 1020   // if VC++ version is > 4.2
   using namespace std;  // std c++ libs implemented in std
#endif
void main( )
{
   multimap <int, int, less<int> > m1;
   multimap <int, int, less<int> >::value_compare vc1 = m1.value_comp( );
   multimap<int,int>::iterator Iter1, Iter2;
   Iter1= m1.insert ( multimap <int, int> :: value_type ( 1, 10 ) );
   Iter2= m1.insert ( multimap <int, int> :: value_type ( 2, 5 ) );
   if( vc1( *Iter1, *Iter2 ) == true )   
   {  cout << "The element ( 1,10 ) precedes the element ( 2,5 )."<< endl;  }
   else   
   {  cout << "The element ( 1,10 ) does "<< "not precede the element ( 2,5 )."<< endl;   }
   if( vc1( *Iter2, *Iter1 ) == true )   
   {  cout << "The element ( 2,5 ) precedes the element ( 1,10 )."<< endl;   }
   else   
   {  cout << "The element ( 2,5 ) does "<< "not precede the element ( 1,10 )."<< endl;   }
}