std::reverse is an STL algorithm to reverse the contents of a container.


#include <algorithm>

#include <iterator>

#include <iostream>

#include <vector>



int main()

{

  std::vector<int> v;

  v.push_back(0);

  v.push_back(1);

  v.push_back(2);

  v.push_back(3);



  //Show the std::vector

  std::copy(v.begin(),v.end(),

    std::ostream_iterator<int>(std::cout," "));

  std::cout << '\n';



  //Reverse the std::vector

  std::reverse(v.begin(),v.end());



  //Show the std::vector

  std::copy(v.begin(),v.end(),

    std::ostream_iterator<int>(std::cout," "));

  std::cout << '\n';

}

Screen output:


0 1 2 3 

3 2 1 0

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(C++) std::reverse