fig20_21.cpp

来自「这是C＋＋编程经典的书上实例的源代码。 （英文名是《C＋＋ how to pr」· C++ 代码 · 共 53 行

// Fig. 20.21: fig20_21.cpp
// Testing Standard Library class multimap
#include <iostream>

using std::cout;
using std::endl;

#include <map>

int main()
{
   typedef std::multimap< int, double, std::less< int > > mmid;
   mmid pairs;

   cout << "There are currently " << pairs.count( 15 )
        << " pairs with key 15 in the multimap\n";
   pairs.insert( mmid::value_type( 15, 2.7 ) );
   pairs.insert( mmid::value_type( 15, 99.3 ) );
   cout << "After inserts, there are " 
        << pairs.count( 15 )
        << " pairs with key 15\n";
   pairs.insert( mmid::value_type( 30, 111.11 ) );
   pairs.insert( mmid::value_type( 10, 22.22 ) );
   pairs.insert( mmid::value_type( 25, 33.333 ) );
   pairs.insert( mmid::value_type( 20, 9.345 ) );
   pairs.insert( mmid::value_type( 5, 77.54 ) );
   cout << "Multimap pairs contains:\nKey\tValue\n";
   
   for ( mmid::const_iterator iter = pairs.begin();
         iter != pairs.end(); ++iter )
      cout << iter->first << '\t' 
           << iter->second << '\n';

   cout << endl;
   return 0;
}


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