chapter9-4.cpp

来自「C++STL程序员开发指南」· C++ 代码 · 共 25 行

//文件名:CHAPTER9-4.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> ms1;
   multiset <int>::iterator ms1_Iter;
   multiset <int>::const_iterator ms1_cIter;
   ms1.insert( 1 );
   ms1.insert( 2 );
   ms1.insert( 3 );
   ms1_Iter = ms1.begin( );
   cout << "The first element of ms1 is " << *ms1_Iter << endl;
   ms1_Iter = ms1.begin( );
   ms1.erase( ms1_Iter );
   // The following 2 lines would err as the iterator is const
   // ms1_cIter = ms1.begin( );
   // ms1.erase( ms1_cIter );
   ms1_cIter = ms1.begin( );
   cout << "The first element of ms1 is now " << *ms1_cIter << endl;
}