Reverse An Array

#include <bits/stdc++.h>
using namespace std;
void reverse(int arr[],int n){
    int i=0,j=n-i-1;
    while(i<j){
        swap(arr[i],arr[j]);
        i++;
        j--;
    }
}
int main() {
    // Write C++ code here
    int arr[]={1,2,3,4};
    reverse(arr,4);
    for(int i=0;i<4;i++){
        cout<<arr[i];
    }
    return 0;
}
                                                                           ANOTHER WAY
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#include <bits/stdc++.h>
using namespace std;
void reverse(int arr[],int n){
    for(int i=0;i<n/2;i++){
        int first_element=arr[i];
        int second_element=arr[n-i-1];
        arr[i]=second_element;
        arr[n-i-1]=first_element;
    }
}
int main() {
    // Write C++ code here
    int arr[]={1,2,3,4};
    reverse(arr,4);
    for(int i=0;i<4;i++){
        cout<<arr[i];
    }
    return 0;
}