reverse an array in c++ stl

To reverse an array in C++ using the Standard Template Library (STL), you can make use of the std::reverse function. Here are the steps to reverse an array using the STL in C++:

1. Include the necessary headers:

#include <algorithm>
#include <iostream>

1. Declare and initialize the array:

int arr[] = {1, 2, 3, 4, 5};
int n = sizeof(arr) / sizeof(arr[0]);

1. Use the std::reverse function to reverse the array:

std::reverse(arr, arr + n);

1. Print the reversed array:

for (int i = 0; i < n; i++) {
    std::cout << arr[i] << " ";
}

This will output the reversed array: 5 4 3 2 1.

Let me know if you have any further questions.