chapter9-2.cpp

C++STL程序员开发指南

//文件名:CHAPTER9-2.cpp
#include <set>
#include <iostream>
#if _MSC_VER > 1020   // if VC++ version is > 4.2
   using namespace std;  // std c++ libs implemented in std
#endif
int main( )
{
   multiset <int>::iterator ms1_Iter, ms2_Iter, ms3_Iter;
   multiset <int>::iterator ms4_Iter, ms5_Iter, ms6_Iter;
   // Create an empty multiset ms0 of key type integer
   multiset <int> ms0;
   // Create an empty multiset ms1 with the key comparison
   // function of less than, then insert 4 elements
   multiset <int, less<int> > ms1;
   ms1.insert( 10 );
   ms1.insert( 20 );
   ms1.insert( 20 );
   ms1.insert( 40 );
   // Create an empty multiset ms2 with the key comparison
   // function of geater than, then insert 2 elements
   multiset <int, greater<int> > ms2;
   ms2.insert( 10 );
   ms2.insert( 20 );
   // Create a multiset ms3 with the 
   // allocator of multiset ms1
   multiset <int>::allocator_type ms1_Alloc;
   ms1_Alloc = ms1.get_allocator( );
   multiset <int> ms3( less<int>( ), ms1_Alloc );
   ms3.insert( 30 );
   // Create a copy, multiset ms4, of multiset ms1
   multiset <int> ms4( ms1 );
   // Create a multiset ms5 by copying the range ms1[_First, _Last)
   multiset <int>::const_iterator ms1_bcIter, ms1_ecIter;
   ms1_bcIter = ms1.begin( );
   ms1_ecIter = ms1.begin( );
   ms1_ecIter++;
   ms1_ecIter++;
//   multiset <int> ms5( ms1_bcIter, ms1_ecIter );
   // Create a multiset ms6 by copying the range ms4[_First, _Last)
   // and with the allocator of multiset ms2
   multiset <int>::allocator_type ms2_Alloc;
   ms2_Alloc = ms2.get_allocator( );
   //multiset <int> ms6( ms4.begin( ), ++ms4.begin( ), less<int>( ), ms2_Alloc );
   cout << "ms1 =";
   for ( ms1_Iter = ms1.begin( ); ms1_Iter != ms1.end( ); ms1_Iter++ )
      cout << " " << *ms1_Iter;
   cout << endl;
   cout << "ms2 = " << *ms2.begin( ) << " " << *++ms2.begin( )
   << endl;
   cout << "ms3 =";
   for ( ms3_Iter = ms3.begin( ); ms3_Iter != ms3.end( ); ms3_Iter++ )
      cout << " " << *ms3_Iter;
   cout << endl;
   cout << "ms4 =";
   for ( ms4_Iter = ms4.begin( ); ms4_Iter != ms4.end( ); ms4_Iter++ )
      cout << " " << *ms4_Iter;
   cout << endl;
/*   cout << "ms5 =";
   for ( ms5_Iter = ms5.begin( ); ms5_Iter != ms5.end( ); ms5_Iter++ )
      cout << " " << *ms5_Iter;
   cout << endl;
   cout << "ms6 =";
   for ( ms6_Iter = ms6.begin( ); ms6_Iter != ms6.end( ); ms6_Iter++ )
      cout << " " << *ms6_Iter;
   cout << endl;*/
}