Implementation of selection sort on array of integers in C

selection_sort.c

#include <stdio.h>


void swap(int *a, int *b);

void print_array(int *arr, int len_arr);

int main(void)
{
   int items[]   = { 5, 2, 7, 4, 1, 6, 3, 0 };
   int len_items = sizeof(items) / sizeof(*items);

   // Print original order
   print_array(items, len_items);

   // Selection sort
   for (int i = 0; i < len_items; ++i)
   {
      int *smallest_number = &items[i];
      for (int j = i + 1; j < len_items; j++)
      {
         if (items[j] < *smallest_number)
         {
            smallest_number = &items[j];
         }
      }
      swap(&items[i], smallest_number);
   }

   // Print sorted order
   print_array(items, len_items);

   return 0;
}


void swap(int *a, int *b)
{
   int tmp = *a;

   *a = *b;
   *b = tmp;
}


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