isdigit

Sprawdza, czy element w ustawieniach regionalnych jest znak numeryczny.

template<Class CharType> 
   bool isdigit( 
      CharType _Ch,  
      const locale& _Loc 
   )

Parametry

• _Ch
  Element ma być testowane.

• _Loc
  Ustawienia regionalne, zawierający element ma być badana.

Wartość zwracana

TRUE Jeśli element testowane jest znaku numerycznego; false Jeśli nie jest.

Uwagi

Funkcja szablonu zwraca use_facet<ctype<CharType>>(_Loc).is(ctype<CharType>::digit, _Ch).

Przykład

// locale_is_digit.cpp
// compile with: /EHsc
#include <locale>
#include <iostream>

using namespace std;

int main( )   
{
   locale loc ( "German_Germany" );
   bool result1 = isdigit ( 'L', loc );
   bool result2 = isdigit ( '@', loc );
   bool result3 = isdigit ( '3', loc );

   if ( result1 )
      cout << "The character 'L' in the locale is "
           << "a numeric character." << endl;
   else
      cout << "The character 'L' in the locale is "
           << " not a numeric character." << endl;

   if ( result2 )
      cout << "The character '@' in the locale is "
           << "a numeric character." << endl;
   else
      cout << "The character '@' in the locale is "
           << " not a numeric character." << endl;

   if ( result3 )
      cout << "The character '3' in the locale is "
           << "a numeric character." << endl;
   else
      cout << "The character '3' in the locale is "
           << " not a numeric character." << endl;
}

Dane wyjściowe

The character 'L' in the locale is  not a numeric character.
The character '@' in the locale is  not a numeric character.
The character '3' in the locale is a numeric character.

Wymagania

Nagłówek:<ustawień regionalnych>

Przestrzeń nazw: std