Returns a const iterator addressing the first element in a reversed map.
const_reverse_iterator crbegin( ) const;
Return Value
A const reverse bidirectional iterator addressing the first element in a reversed map Class or addressing what had been the last element in the unreversed map.
Remarks
crbegin is used with a reversed map just as map::begin is used with a map.
With the return value of crbegin, the map object cannot be modified
crbegin can be used to iterate through a map backwards.
Example
// map_crbegin.cpp
// compile with: /EHsc
#include <map>
#include <iostream>
int main( )
{
using namespace std;
map <int, int> m1;
map <int, int> :: const_reverse_iterator m1_crIter;
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_crIter = m1.crbegin( );
cout << "The first element of the reversed map m1 is "
<< m1_crIter -> first << "." << endl;
}
The first element of the reversed map m1 is 3.
Requirements
Header: <map>
Namespace: std