//文件名:CHAPTER9-1.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( )
{
   set <int>::iterator s1_Iter, s2_Iter, s3_Iter, s4_Iter, s5_Iter, s6_Iter;
   // Create an empty set s0 of key type integer
   set <int> s0;
   // Create an empty set s1 with the key comparison
   // function of less than, then insert 4 elements
   set <int, less<int> > s1;
   s1.insert( 10 );
   s1.insert( 20 );
   s1.insert( 30 );
   s1.insert( 40 );
   // Create an empty set s2 with the key comparison
   // function of geater than, then insert 2 elements
   set <int, greater<int> > s2;
   s2.insert(10);
   s2.insert(20);
   // Create a set s3 with the 
   // allocator of set s1
   set <int>::allocator_type s1_Alloc;
   s1_Alloc = s1.get_allocator( );
   set <int> s3( less<int>( ), s1_Alloc );
   s3.insert( 30 );
   // Create a copy, set s4, of set s1
   set <int> s4( s1 );
   // Create a set s5 by copying the range s1[_First, _Last)
   set <int>::const_iterator s1_bcIter, s1_ecIter;
   s1_bcIter = s1.begin( );
   s1_ecIter = s1.begin( );
   s1_ecIter++;
   s1_ecIter++;
  // set <int> s5( s1_bcIter, s1_ecIter );
   // Create a set s6 by copying the range s4[_First, _Last)
   // and with the allocator of set s2
   set <int>::allocator_type s2_Alloc;
   s2_Alloc = s2.get_allocator( );
//   set <int> s6( s4.begin( ), ++s4.begin( ), less<int>( ), s2_Alloc );
   cout << "s1 =";
   for ( s1_Iter = s1.begin( ); s1_Iter != s1.end( ); s1_Iter++ )
      cout << " " << *s1_Iter;
   cout << endl;
   cout << "s2 = " << *s2.begin( ) << " " << *++s2.begin( ) << endl;
   cout << "s3 =";
   for ( s3_Iter = s3.begin( ); s3_Iter != s3.end( ); s3_Iter++ )
      cout << " " << *s3_Iter;
   cout << endl;
   cout << "s4 =";
   for ( s4_Iter = s4.begin( ); s4_Iter != s4.end( ); s4_Iter++ )
      cout << " " << *s4_Iter;
   cout << endl;
  /* cout << "s5 =";
   for ( s5_Iter = s5.begin( ); s5_Iter != s5.end( ); s5_Iter++ )
      cout << " " << *s5_Iter;
   cout << endl;
   cout << "s6 =";
   for ( s6_Iter = s6.begin( ); s6_Iter != s6.end( ); s6_Iter++ )
      cout << " " << *s6_Iter;
   cout << endl;*/
   return 0;
}