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:
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use_facet < ctype<charT> > (loc).is (ctype_base::xdigit, c)
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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;
}
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Output:
The hexadecimal number ffff is 65535.
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See also
| ctype | Character type facet (class template) |
| isdigit | Check if character is a decimal digit using locale (function template) |
| isalnum | Check if character is alphanumeric using locale (function template) |
| isalpha | Check if character is alphabetic using locale (function template) |
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