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struct vp { int vowels, punct; };
struct vp
count_vowels_and_punct (char *string)
{
 int c;
 int vowels = 0;
 int punct = 0;
 /* Don’t change the parameter itself. */
 /* That helps in debugging. */
 char *p = string;
 struct vp value;
 while (c = *p++)
 switch (c)
 {
 case 'y':
 case 'Y':
 /* We assume y_is_consonant will check surrounding
 letters to determine whether this y is a vowel. */
 if (y_is_consonant (p - 1))
 break;
 /* Falls through */
 case 'a':
 case 'e':
 case 'i':
 case 'o':
 case 'u':
 case 'A':
 case 'E':
 case 'I':
 case 'O':
 case 'U':
 vowels++;
 break;
 case '.':
 case ',':
 case ':':
 case ';':
 case '?':
 case '!':
 case '\"':
 case '\'':
 punct++;
 break;
 }
 value.vowels = vowels;
 value.punct = punct;
 return value;
}