chapter9-21.cpp

C++STL程序员开发指南

//文件名:CHAPTER9-21.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> s1;
   s1.insert( 1 );
   s1.insert( 2 );
   cout << "The size of the set is initially " << s1.size( )<< "." << endl;
   s1.clear( );
   cout << "The size of the set after clearing is "<< s1.size( ) << "." << endl;
}