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
// CPP program to illustrate // multimap::rend() #include <iostream> #include <map> using namespace std;
int main()
{ multimap< char , int > sample;
// Insert pairs in the multimap
sample.insert(make_pair( 'a' , 10));
sample.insert(make_pair( 'b' , 20));
sample.insert(make_pair( 'c' , 30));
sample.insert(make_pair( 'c' , 40));
// Show content
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
// CPP program to illustrate // multimap::rend() #include <iostream> #include <map> using namespace std;
int main()
{ multimap< char , int > sample;
// Insert pairs in the multimap
sample.insert(make_pair( 'a' , 10));
sample.insert(make_pair( 'b' , 20));
sample.insert(make_pair( 'c' , 30));
sample.insert(make_pair( 'c' , 40));
// Get the iterator pointing to
// the preceding position of 1st element of the multimap
auto it = sample.rend();
// Get the iterator pointing to
// the 1st element of the multimap
it--;
cout << it->first << " = " << it->second;
} |
Output
a = 10