Write a C++ program to compute the difference between the largest and smallest values in a given array of integers and length one or more

#include <iostream>
using namespace std;

 static int test(int nums[], int arr_length)
          {
            int small_num = 0, biggest_num = 0;

            if (arr_length > 0) small_num = biggest_num = nums[0];

            for (int i = 1; i < arr_length; i++)
            {
                small_num = min(small_num, nums[i]);
                biggest_num = max(biggest_num, nums[i]);
            }

            return biggest_num - small_num;
          }        
               
int main() 
 {  
  int nums1[] = { 1, 5, 7, 9, 10, 12};
  int arr_length = sizeof(nums1) / sizeof(nums1[0]);	
  cout << test(nums1, arr_length) << endl; 
  int nums2[] = {0, 2, 4, 6, 8, 10};
  arr_length = sizeof(nums2) / sizeof(nums2[0]);	
  cout << test(nums2, arr_length) << endl;  
  return 0;    
}