sort-5.c

#include <stdio.h>
#include <string.h>
#include <unistd.h>

int comparisons = 0;

void display (char **name, int left, int right)
{
  printf ("\e[H\e[J");
  for (int i = 0; name[i]; i++)
    {
      printf ("%s", name[i]);
      if (i == left || i == right)
        printf (" <--");
      printf ("\n");
    }
  printf ("%d\n", comparisons);
}

int compare (char **name, int left, int right)
{
  int result = strcmp (name[left], name[right]);
  comparisons++;
  display (name, left, right);
  usleep (200);
  return result;
}

int find_first (char **name, int i0)
{
  int first = i0;
  for (int i = i0 + 1; name[i]; i++)
    if (compare (name, i, first) < 0)
      first = i;
  return first;
}

void sort (char **name)
{
  int sorted = 0;
  while (name[sorted])
    {
      int first = find_first (name, sorted);
      char *temp = name[sorted];
      name[sorted] = name[first];
      name[first] = temp;
      sorted++;
    }
}

int main (void)
{
  char *name[] = {
                   #include "names.h"
                   NULL
                 };
  sort (name);
  display (name, -1, -1);
  return 0;
}