isalpha

Testuje, zda prvek národní prostředí je abecední znak.

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

Parametry

• _Ch
  Prvek zkoušet.

• _Loc
  Národní prostředí obsahující prvek abecední zkoušet.

Vrácená hodnota

True Pokud je prvkem testován abecední; FALSE Pokud není.

Poznámky

Vrátí funkce šablony use_facet<ctype<CharType> >(_Loc).is(ctype<CharType>::alpha, _Ch).

Příklad

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

using namespace std;

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

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

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

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

Výsledek

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

Požadavky

Záhlaví: <locale>

Obor názvů: std