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);
// C++ program to reverse Array // using reverse() in STL #include <algorithm> #include <iostream> 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; } |
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Output:
Array: 1 45 54 71 76 12 Reversed Array: 12 76 71 54 45 1
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