Function reverse

CPP/array-2d/reverse_array.cpp:3–12

		#include<bits/stdc++.h>
		using namespace std;
		int reverse(int arr[], int n){
			int s=0;
			int e= n-1;
			while(s<=e){
				swap(arr[s],arr[e]);
				s+=1;
				e-=1;
			}
			return 0;
		}
		void initial(){
		#ifndef ONLINE_JUDGE
		freopen("input.txt", "r", stdin);