/* qsort with GCC nested functions
 */

#include <stdio.h>
#include <stdlib.h>


int main(int argc, char **argv)
{
  char *words[] = { "bespoken", "readouts", "coopering", "subtitling",
                    "demographer", "censoring", "uttered", "flashes",
  };
  enum { nwords = sizeof(words) / sizeof(words[0]) };

  int k = atoi(argv[1]);
  int compare(const void *a, const void *b)
  {
    char *ac = *(char**)a;
    char *bc = *(char**)b;
    return ac[k] - bc[k];
  }

  qsort(words, nwords, sizeof(words[0]), compare);
  for (size_t i = 0; i < nwords; i++) {
    printf("- %s\n", words[i]);
  }
  return 0;
}