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How to reverse an Array using STL in C++?
Here we will see how to reverse an array using STL functions in C++. So if the array is like A = [10, 20, 30, 40, 50, 60], then the output will be B = [60, 50, 40, 30, 20, 10]. To reverse we have one function called reverse() present in the header file <algorithm>. The code is like below −
Example
#include <iostream>
#include <algorithm>
using namespace std;
int main() {
int arr[] = {10, 20, 30, 40, 50, 60};
int n = sizeof(arr) / sizeof(arr[0]);
cout << "Array before reverse: ";
for (int i = 0; i < n; i++)
cout << arr[i] << " ";
reverse(arr, arr + n);
cout << "\nArray after reverse: ";
for (int i = 0; i < n; i++)
cout << arr[i] << " ";
}Output
Array before reverse: 10 20 30 40 50 60 Array after reverse: 60 50 40 30 20 10
Updated on: 17-Dec-2019
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