STL_map——map::end

Reference:
Returns an iterator that addresses the location succeeding the last element in a map.

Function:
const_iterator end( ) const;
iterator end( );

Return Value:
A bidirectional iterator that addresses the location succeeding the last element in a map. If the map is empty, then map::end == map::begin.

Remarks:
end is used to test whether an iterator has reached the end of its map.
The value returned by end should not be dereferenced.

Example:

#include <map>
#include <iostream>
int main( )
{
using namespace std;
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 ( 1, 10 ) );
m1.insert ( Int_Pair ( 2, 20 ) );
m1.insert ( Int_Pair ( 3, 30 ) );
m1_cIter = m1.end( );
m1_cIter--;
cout << "The value of the last element of m1 is:n"
<< m1_cIter -> second << endl;
m1_Iter = m1.end( );
m1_Iter--;
m1.erase ( m1_Iter );
m1_cIter = m1.end( );
m1_cIter--;
cout << "The value of the last element of m1 is now:n"
<< m1_cIter -> second << endl;
}

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