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Top Forums Programming how to check whether given numbe ris hex or not Post 302243770 by era on Monday 6th of October 2008 02:31:51 PM
Old 10-06-2008
Or maybe you are simply looking for isxdigit()
 

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DIGITTOINT(3)						   BSD Library Functions Manual 					     DIGITTOINT(3)

NAME
digittoint, digittoint_l -- convert a numeric character to its integer value LIBRARY
Standard C Library (libc, -lc) SYNOPSIS
#include <ctype.h> int digittoint(int c); #include <xlocale.h> #include <ctype.h> int digittoint_l(int c, locale_t loc); DESCRIPTION
The digittoint() function converts a numeric character to its corresponding integer value. The character can be any decimal digit or hexa- decimal digit. With hexadecimal characters, the case of the values does not matter. While the digittoint() function uses the current locale, the digittoint_l() function may be passed a locale directly. See xlocale(3) for more information. RETURN VALUES
The digittoint() function always returns an integer from the range of 0 to 15. If the given character was not a digit as defined by isxdigit(3), the function will return 0. SEE ALSO
ctype(3), isdigit(3), isxdigit(3), xlocale(3) BSD
April 6, 2001 BSD
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