isalpha

Testet, ob ein Element in einem Gebietsschema ein alphabetisches Zeichen ist.

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

Parameter

• _Ch
  Das zu testenden Element.

• _Loc
  Das Gebietsschema, das das getestet werden Alphaordnungselement enthält.

Rückgabewert

true, wenn das Element, das getestet wird, alphabetisch ist; false, wenn nicht ist.

Hinweise

Die Vorlagenfunktion gibt use_facet<ctype<CharType> >(_Loc).is(ctype<CharType>::alpha, _Ch) zurück.

Beispiel

// 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;
}

Output

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.

Anforderungen

Header: <locale>

Namespace: std