isxdigit


function template
<locale>
template <class charT>
  bool isxdigit ( charT c, const locale& loc );

Check if character is hexadecimal digit using locale

Checks whether c is a hexadecimal digit using ctype facet of locale loc, returning the same as a call to:

 
use_facet < ctype<charT> > (loc).is (ctype_base::xdigit, c)


This function replicates the functionality of its C-library equivalent isxdigit. See isxdigit for more info.

Parameters

c
Character to be checked.
loc
Locale to be used. Shall have facet ctype present.


Template parameter charT is the character type.

Return Value

true if indeed c is a hexadecimal digit, false otherwise.

Example

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// isxdigit example (C++)
#include <iostream>
#include <string>
#include <sstream>
#include <locale>
using namespace std;

int main ()
{
  locale loc;
  string str="ffff";
  if ( isxdigit(str[0],loc) )
  {
    int number;
    stringstream(str) >> hex >> number;
    cout << "The hexadecimal number " << hex << number;
    cout << " is " << dec << number << ".\n";
  }
  return 0;
}


Output:

The hexadecimal number ffff is 65535.


See also