isdigit
ロケールの要素が数値であるかどうかをテストします。
template<Class CharType>
bool isdigit(
CharType _Ch,
const locale& _Loc
)
パラメーター
_Ch
テストする要素。_Loc
テストされる要素を含むロケール。
戻り値
テストされる要素が数値の場合true ; ある false。
解説
このテンプレート関数は use_facet<ctype<CharType>> を返します (_Loc)。です。 (ctype<CharTypeの >::digit、_Ch)。
使用例
// 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;
}
出力
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.
必要条件
ヘッダー: <locale>
名前空間: std