C++ Locale Library - isxdigit

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Description

It checks if character is hexadecimal digit.

Declaration

Following is the declaration for std::isxdigit.

C++98

 int isxdigit ( int c ); 

C++11

 int isxdigit ( int c ); 

Parameters

c − Character to be checked, casted to an int, or EOF.

Return Value

It returns a value different from zero.

Exceptions

No-throw guarantee − this function never throws exceptions.

Example

In below example for std::isxdigit.

 #include <stdio.h> #include <stdlib.h> #include <ctype.h> int main () { char str[]="ffff"; long int number; if (isxdigit(str[0])) { number = strtol (str,NULL,16); printf ("The hexadecimal number %lx is %ld.\n",number,number); } return 0; } 

The sample output should be like this −

 The hexadecimal number ffff is 65535.