CHAPTER10-3.cpp
上传用户:fjc899
上传日期:2007-07-03
资源大小:187k
文件大小:1k
- //文件名:CHAPTER10-3.cpp
- #include <map>
- #include <iostream>
- #if _MSC_VER > 1020 // if VC++ version is > 4.2
- using namespace std; // std c++ libs implemented in std
- #endif
- void main( )
- {
- map <int, int> m1;
- int i;
- map <int, int> :: iterator m1_Iter;
- map <int, int> :: const_iterator m1_cIter;
- typedef pair <int, int> Int_Pair;
- m1.insert ( Int_Pair ( 0, 0 ) );
- m1.insert ( Int_Pair ( 1, 1 ) );
- m1.insert ( Int_Pair ( 2, 4 ) );
- m1_cIter = m1.begin ( );
- cout << "The first element of m1 is " << m1_cIter -> first << endl;
- m1_Iter = m1.begin ( );
- m1.erase ( m1_Iter );
- // The following 2 lines would err because the iterator is const
- // m1_cIter = m1.begin ( );
- // m1.erase ( m1_cIter );
- m1_cIter = m1.begin( );
- cout << "The first element of m1 is now " << m1_cIter -> first << endl;
- }