reverse for loop c++ code example

Example 1: for loop reverse C++

// Using iterators
for (auto it = s.crbegin() ; it != s.crend(); ++it) {
  std::cout << *it;
}

// Naive
for (int i = s.size() - 1; i >= 0; i--) {
  std::cout << s[i];
}

Example 2: reverse an array in c++ using while loop

#include <iostream>
using namespace std;
int main()
{
	const int SIZE = 9;
	int arr [SIZE];
	cout << "Enter numbers: \n";
	for (int i = 0; i < SIZE; i++)
		cin >> arr[i];
	for (int i = 0; i < SIZE; i++)
		cout << arr[i] << "\t";
	cout << endl;
	cout << "Reversed Array:\n";
	int temp, start = 0, end = SIZE-1;
	while (start < end)
	{
		temp = arr[start];
		arr[start] = arr[end];
		arr[end] = temp;
		start++;
		end--;
	}
	for (int i = 0; i < SIZE; i++)
		cout << arr[i] << "\t";
	cout << endl;	
	}