Character Test Functions:
In the following table the required functions and their tests are given.
|
Function
|
Test
|
|
isalnum(c)
|
Is c an alphanumeric character?
|
|
isalpha(c)
|
Is c an alphabetic character?
|
|
isdigit(c)
|
Is c a digit?
|
|
islower(c)
|
Is c a lower case letter?
|
|
isprint(c)
|
Is c a printable character?
|
|
ispunct(c)
|
Is c a punctuation mark?
|
|
isspace(c)
|
Is c a white space character?
|
|
isupper(c)
|
Is c an upper case later?
|