std::list<T,Allocator>::reverse (3) - Linux Manuals

std::list<T,Allocator>::reverse: std::list<T,Allocator>::reverse

NAME

std::list<T,Allocator>::reverse - std::list<T,Allocator>::reverse

Synopsis

void reverse(); (until C++11)
void reverse() noexcept; (since C++11)

Reverses the order of the elements in the container. No references or iterators become invalidated.

Parameters

(none)

Return value

(none)

Complexity

Linear in the size of the container

Example

// Run this code

  #include <iostream>
  #include <list>

  std::ostream& operator<<(std::ostream& ostr, const std::list<int>& list)
  {
      for (auto &i : list) {
          ostr << " " << i;
      }
      return ostr;
  }

  int main()
  {
      std::list<int> list = { 8,7,5,9,0,1,3,2,6,4 };

      std::cout << "before: " << list << "\n";
      list.sort();
      std::cout << "ascending: " << list << "\n";
      list.reverse();
      std::cout << "descending: " << list << "\n";
  }

Output:

  before: 8 7 5 9 0 1 3 2 6 4
  ascending: 0 1 2 3 4 5 6 7 8 9
  descending: 9 8 7 6 5 4 3 2 1 0