Reverse of the array element!! Why does one code(1st code) run n other(2nd code) does not give the desired result

Question

#include <iostream>
using namespace std;

int main() {
int n;
cin>>n;

int arr[n];
for(int i=0;i<n;i++){
cin>>arr[i];
}

int i=0;
int j=n-1;
while (i<j){
int temp;
temp=arr[i];
arr[i]=arr[j];
arr[j]=temp;

i++;
j--;
}

for(int i=0;i<n;i++){
cout<<arr[i]<<" ";
}
return 0;
}

*****// Another code*****

#include <iostream>
using namespace std;

int main() {
int n;
cin>>n;

int arr[n];
for(int i=0;i<n;i++){
cin>>arr[i];
}

int i=0;
while (i<j){
int temp;
temp=arr[i];
arr[i]=arr[n-i-1];
arr[n-i-1]=temp;

i++;
}

for(int i=0;i<n;i++){
cout<<arr[i]<<" ";
}
return 0;
}

Answer 1

Vliz's ya sure gimme ur code too