Tests whether an element in a locale is a character used to represent a hexadecimal number.
template<Class CharType>
bool isxdigit(
CharType _Ch,
const locale& _Loc
)
Parameters
_Ch
The element to be tested._Loc
The locale containing the element to be tested.
Return Value
true if the element tested is a character used to represent a hexadecimal number; false if it is not.
Remarks
The template function returns use_facet<ctype< CharType> >(_Loc).is(ctype<CharType>::xdigit, _Ch).
Hexadecimal digits use base 16 to represent numbers, using the numbers 0 through 9 plus case-insensitive letters A through F to represent the decimal numbers 0 through 15.
Example
// locale_isxdigit.cpp
// compile with: /EHsc
#include <locale>
#include <iostream>
using namespace std;
int main( )
{
locale loc ( "German_Germany" );
bool result1 = isxdigit ( '5', loc );
bool result2 = isxdigit ( 'd', loc );
bool result3 = isxdigit ( 'q', loc );
if ( result1 )
cout << "The character '5' in the locale is "
<< "a hexidecimal digit-character." << endl;
else
cout << "The character '5' in the locale is "
<< " not a hexidecimal digit-character." << endl;
if ( result2 )
cout << "The character 'd' in the locale is "
<< "a hexidecimal digit-character." << endl;
else
cout << "The character 'd' in the locale is "
<< " not a hexidecimal digit-character." << endl;
if ( result3 )
cout << "The character 'q' in the locale is "
<< "a hexidecimal digit-character." << endl;
else
cout << "The character 'q' in the locale is "
<< " not a hexidecimal digit-character." << endl;
}
Output
The character '5' in the locale is a hexidecimal digit-character.
The character 'd' in the locale is a hexidecimal digit-character.
The character 'q' in the locale is not a hexidecimal digit-character.
Requirements
Header: <locale>
Namespace: std