C language ctype.h in series character handling functions

I. Introduction

　　C language function in a series devoted to the characters, ctype.h header file contains prototypes for these functions. The function accepts a character as an argument, if the character belongs to a specific type, it returns a nonzero value (true); otherwise. Return 0 (false).

Two, ctype.h header file character test function

 

ctype.h header file character test function

Three, ctype.h header file character mapping function

ctype.h header file character mapping function