isalnum

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

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

Parameter

• _Ch
  Das alphanumerische zu testenden Element.

• _Loc
  Das Gebietsschema, das das alphanumerische zu testenden Element enthält.

Rückgabewert

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

Beispiel

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

using namespace std;

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

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

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

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

Anforderungen

Header: <locale>

Namespace: std