multiset rbegin() and rend() function in C++ STL
- multiset::rbegin() is a built-in function in C++ STL which returns a reverse iterator pointing to the last element in the multiset container. Syntax:
reverse_iterator multiset_name.rbegin()
- Parameters: The function does not take any parameter. Return value: The function returns a reverse iterator pointing to the last element in the container. Below program illustrate the multiset::rbegin() method:
CPP
// CPP program to demonstrate the // multiset::rbegin() function #include <bits/stdc++.h> using namespace std; int main() { int arr[] = { 15, 12, 15, 11, 10, 10 }; // initializes the set from an array multiset< int > s(arr, arr + 6); multiset< int >::reverse_iterator rit; // prints all elements in reverse order for (rit = s.rbegin(); rit != s.rend(); rit++) cout << *rit << " "; cout << "\nThe last element in multiset is " << *(s.rbegin()); return 0; } |
Output:
15 15 12 11 10 10 The last element in multiset is 15
- multiset::rend() in an inbuilt function in C++ STL which returns a reverse iterator pointing to the theoretical element right before the first element in the multiset container. Syntax:
reverse_iterator multiset_name.rend()
- Parameter: The function does not accepts any parameter. Return value: The function returns a reverse iterator pointing to the theoretical element right before the first element in the multiset container. Below program illustrate the multiset::rend() function:
CPP
// CPP program to demonstrate the // multiset::rend() function #include <bits/stdc++.h> using namespace std; int main() { int arr[] = { 15, 13, 15, 11, 13, 10 }; // initializes the set from an array multiset< int > s(arr, arr + 6); multiset< int >::reverse_iterator rit; // prints all elements in reverse order for (rit = s.rbegin(); rit != s.rend(); rit++) cout << *rit << " "; return 0; } |
Output:
15 15 13 13 11 10
Let us see the differences in a tabular form -:
multiset rbegin() | multiset rend() | |
1. | It is used to return a reverse iterator pointing to the last element in the container | It is used to return a reverse iterator pointing to the theoretical element right before the first element in the multiset container |
2. | Its syntax is -: reverse_iterator rbegin(); | Its syntax is -: reverse_iterator rend(); |
3. | It does not take any parameters. | It does not take any parameters. |
4. | Its complexity is constant. | Its complexity does not changes. |
5. | Its iterator validity does not changes. | Its iterator validity does not change. |
Please Login to comment...