Reverse an Array In-Place

#include <stdio.h>

void reverse_array(int arr[], int n) {
    // Your logic here
    // Approach 1:
    // int left = 0, right = n - 1;
    // while (left < right) {
    //     int t = arr[left];
    //     arr[left] = arr[right];
    //     arr[right] = t;
    //     left++;
    //     right--;
    // }

    // Approach 2:
    for (int i = 0; i < n/2; i++) {
        int t = arr[i];
        arr[i] = arr[n - i - 1];
        arr[n - i - 1] = t;
    }
}

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;
}