stdlib/testsort.c

   1 #include <stdlib.h>
   2 #include <string.h>
   3 #include <stdio.h>
   4
   5 static int
   6 compare (const void *a, const void *b)
   7 {
   8   return strcmp (*(char **) a, *(char **) b);
   9 }
  10
  11 int
  12 main (void)
  13 {
  14   char bufs[500][20];
  15   char *lines[500];
  16   size_t lens[500];
  17   size_t i, j;
  18
  19   srandom (1);
  20
  21   for (i = 0; i < 500; ++i)
  22     {
  23       lens[i] = random() % 19;
  24       lines[i] = bufs[i];
  25       for (j = 0; j < lens[i]; ++j)
  26         lines[i][j] = random() % 26 + 'a';
  27       lines[i][j] = '\0';
  28     }
  29
  30   qsort (lines, 500, sizeof (char *), compare);
  31
  32   for (i = 0; i < 500 && lines[i] != NULL; ++i)
  33     puts (lines[i]);
  34
  35   return 0;
  36 }