Reverse an Array In-Place

#include <stdio.h>
int temp = 0;
void reverse_array(int arr[], int n) {

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

int main() {
    int n;
    scanf("%d", &n);

    int arr[100];
    for (int i = 0; i < n; i++) {
        scanf("%d", &arr[i]);
    }

    reverse_array(arr, n);

    for (int i = 0; i < n; i++) {
        printf("%d", arr[i]);
        if(i < n-1){
        	printf(" ");
        }
    }
    return 0;
}