How to reverse an Array using STL in C++?

Given an array arr[], reverse this array using STL in C++.

Example:

Input: arr[] = {1, 45, 54, 71, 76, 12}
Output: {12, 76, 71, 54, 45, 1}

Input: arr[] = {1, 7, 5, 4, 6, 12}
Output: {12, 6, 4, 5, 7, 1}

Approach: Reversing can be done with the help of reverse() function provided in STL.



Syntax:

reverse(start_index, last_index);
filter_none

edit
close

play_arrow

link
brightness_4
code

// C++ program to reverse Array
// using reverse() in STL
  
#include <bits/stdc++.h>
using namespace std;
  
int main()
{
    // Get the array
    int arr[] = { 1, 45, 54, 71, 76, 12 };
  
    // Compute the sizes
    int n = sizeof(arr) / sizeof(arr[0]);
  
    // Print the array
    cout << "Array: ";
    for (int i = 0; i < n; i++)
        cout << arr[i] << " ";
  
    // Reverse the array
    reverse(arr, arr + n);
  
    // Print the reversed array
    cout << "\nReversed Array: ";
    for (int i = 0; i < n; i++)
        cout << arr[i] << " ";
    return 0;
}

chevron_right


Output:

Array: 1 45 54 71 76 12 
Reversed Array: 12 76 71 54 45 1


My Personal Notes arrow_drop_up

Check out this Author's contributed articles.

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.




Article Tags :
Practice Tags :


3


Please write to us at contribute@geeksforgeeks.org to report any issue with the above content.