#include <string.h>
#include <stdio.h>                  /* for printf */
void tst_strspn ( char *digit_str) {
   char octd [] = "01234567";
   int i;
   i = strspn (digit_str, octd);
   if (digit_str [i] != '\0')
      printf ("%c is not an octal digit\n", digit_str [i]);
}

void tst_strcspn (void) {
   char buf [] = "13254.7980";
   int i;
   i = strcspn (buf, ".,");
   if (buf [i] != '\0')
      printf ("%c was found in %s\n", (char) buf [i], buf);
}

void tst_strpbrk (void) {
   char vowels [] ="AEIOUaeiou";
   char text [] = "Seven years ago...";
   char * p;
   p = strpbrk (text, vowels);
   if (p == NULL)
      printf ("No vowels found in %s\n", text);
   else
      printf ("Found a vowel at %s\n", p);
}

void tst_strrpbrk (void) {
   char vowels [] ="AEIOUaeiou";
   char text [] = "American National Standards Institute";
   char * p;
   p = strpbrk (text, vowels);
   if (p == NULL)
      printf ("No vowels found in %s\n", text);
   else
      printf ("Last vowel is at %s\n", p);
}