isalpha
測試一個項目中的地區設定是一個字母字元。
template<Class CharType>
bool isalpha(
CharType _Ch,
const locale& _Loc
)
參數
_Ch
要測試的項目。_Loc
含有字母之項目的地區設定要測試的。
傳回值
true ,如果測試的項目依字母順序排列, false ,否則會傳回。
備註
樣板函式傳回 use_facet<ctype<CharType> > (_Loc)。是(ctype<CharType>::alpha, _Ch)。
範例
// 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.
需求
標題: <locale>
命名空間: std