Isalpha (INT c) Check whether parameter C is an English letter

/* Int isalpha (INT c) function description checks whether the parameter C is an English letter. In Standard C, it is equivalent to using (isupper (c) | islower (c )) perform the test. Returns true if parameter C is an English letter; otherwise, returns NULL (0 ). Additional description: This is a macro definition. For non-real function examples * // * Find the characters in the STR string that are English letters */# include <ctype. h> # include <stdio. h> void main () {char STR [] = "[email protected] # FDSP [E? "; Int I; for (I = 0; STR [I]! = 0; I ++) if (isalpha (STR [I]) printf ("% C is an alphanumeric character \ n", STR [I]);} /* Run C is an apphabetic characterf is an apphabetic characterd is an apphabetic characters is an apphabetic characterp is an apphabetic charactere is an apphabetic character */

 

Isalpha (INT c) Check whether parameter C is an English letter