SAS/C Library Reference, Vol. 1

iscsym -- Test for Valid C Identifier Symbol

SYNOPSIS

 #include <lctype.h>

 int iscsym(int c);

DESCRIPTION

iscsym tests an integer value to determine whether it is a character that can appear in a C identifier (after the first character). This implementation includes the uppercase and lowercase alphabetic characters, the digits, and the underscore as valid characters.

RETURN VALUE

iscsym returns 0 if the character is not a valid character in a C identifier, or a nonzero value if it is. If the argument is EOF, 0 is returned.

CAUTION

The effect of iscsym on a noncharacter argument other than EOF is undefined. Do not assume that iscsym returns either 0 or 1.

EXAMPLE

See iscsymf for an example of this function.

RELATED FUNCTIONS

iscsymf