Reverse an Array In-Place

Code

#include <stdio.h>

void reverse_array(int arr[], int n) {
    if (arr == 0 || n <= 1)
    return ;

    int *start = arr;
    int *end = arr + n - 1;
    int i;
    
    for (i = 0; i< n/2; ++i)
    {
        int temp = *start;
        *start = *end;
        *end = temp;

        start++;
        end--;
    }
}

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;
}

Solving Approach