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 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;
} |
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 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;
} |
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. |