CodePudding user response:

Ch==
Use the==, rather than=number

CodePudding user response:

CodePudding user response:

this is wrong, ch=='| | ch==' \ n '

CodePudding user response:

 # include & lt; Ctype. H> 

C int isalnum (int); 
C int isalpha (int); 
C int isascii (int); 
C int isblank (int); 
C int iscntrl (int); 
C int isdigit (int); 
C int isgraph (int); 
C int islower (int); 
C int isprint (int); 
C int ispunct (int); 
C int isspace (int); 
C int isupper (int); 
C int isxdigit (int); 


The values returned are nonzero if The character falls into The c * class, and a zero value if not. 

For your reference ~
Library function, the matching returns non-zero.

CodePudding user response:

equals in logic is 2=! Please note that the line 11!