Reverse an Array In-Place

Code

#include <stdio.h>

void reverse_array(int arr[], int n) {
  for (int i = 0; i < n / 2; i++) {
    int tmp = arr[i];
    arr[i] = arr[n - i - 1];
    arr[n - i - 1] = tmp;
  }
}

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