/* ctype.h */
#ifndef CTYPE_H
#define CTYPE_H

/* Test if given character is alpha (including underscore) */
int alpha(char c);

/* Test if given character is numeric */
int numeric(char c);

/* Test if given character is alphanumeric */
int an(char c);

/* Convert lower case to upper */
char toupperi(char c);

#endif /* CTYPE_H */