C++ Set Library - rbegin Function

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Description

It returns a reverse iterator pointing to the last element in the container.

Declaration

Following are the ways in which std::set::rbegin works in various C++ versions.

C++98

 reverse_iterator rbegin(); const_reverse_iterator rbegin() const; 

C++11

 reverse_iterator rbegin() noexcept; const_reverse_iterator rbegin() const noexcept; 

Return value

It returns a reverse iterator pointing to the last element in the container.

Exceptions

It never throws exceptions.

Time complexity

Time complexity is contstant.

Example

The following example shows the usage of std::set::rbegin.

 #include <iostream> #include <set> int main () { int myints[] = {20,40,60,80,100}; std::set<int> myset (myints,myints+10); std::set<int>::reverse_iterator rit; std::cout << "myset contains:"; for (rit = myset.rbegin(); rit != myset.rend(); ++rit) std::cout << ' ' << *rit; std::cout << '\n'; return 0; } 

The above program will compile and execute properly.

 myset contains: 4203005 100 80 60 40 20 0