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

#define TRUE 1
#define FALSE 0

/* compare two strings */
/* return 1 if first string is greater, -1 if second one is greater and 0 if 
   they are equal */

int compare (const void *sv1, const void *sv2) {

  char *s1 = *((char **) sv1); /* void * is actually a char ** */
  char *s2 = *((char **) sv2);

  while (TRUE) {
    if (*s1 == '\0') {
      if (*s2 == '\0') {
	return 0;
      }
      return -1;
    }
    if (*s2 == '\0') {
      return 1;
    }

    if (*s1 < *s2) {
      return -1;
    }
    if (*s1 > *s2) {
      return 1;
    }
    s1++;
    s2++;
  }
}
      

int main (int argc, char *argv[]) {
  
  int i;
  
  for (i = 0; i < (argc - 1); i++) {
    printf ("The next argument is %s\n", argv[i+1]);
  }

  /* sort the arguments by using a library function */
  qsort (&(argv[1]), argc - 1, sizeof (char *), compare);
   
  for (i = 0; i < (argc - 1); i++) {
    printf ("The next sorted argument is %s\n", argv[i+1]);
  }

  exit (0);

}