multimap rend in C++ STL
Last Updated :
18 Oct, 2018
multimap::rend() is a built-in function in C++ STL which returns a reverse iterator pointing to the theoretical element preceding to the first element of the multimap container.
Syntax
multimap_name.rend()
Parameters: The function does not take any parameter.
Return ValueThe function returns a reverse iterator pointing to the reverse end of the multimap container i.e a reverse iterator pointing to the position right before the first element of the multimap.
The iterator returned by multimap::rend() cannot be dereferenced.
The following 2 programs illustrates the function
#include <iostream>
#include <map>
using namespace std;
int main()
{
multimap< char , int > sample;
sample.insert(make_pair( 'a' , 10));
sample.insert(make_pair( 'b' , 20));
sample.insert(make_pair( 'c' , 30));
sample.insert(make_pair( 'c' , 40));
for ( auto it = sample.rbegin(); it != sample.rend(); it++)
cout << it->first << " = " << it->second << endl;
}
|
Output
c = 40
c = 30
b = 20
a = 10
Program 2
#include <iostream>
#include <map>
using namespace std;
int main()
{
multimap< char , int > sample;
sample.insert(make_pair( 'a' , 10));
sample.insert(make_pair( 'b' , 20));
sample.insert(make_pair( 'c' , 30));
sample.insert(make_pair( 'c' , 40));
auto it = sample.rend();
it--;
cout << it->first << " = " << it->second;
}
|
Output
a = 10
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