isgraph
测试一个元素来包装区域设置是一个字母数字或标点符号。
template<Class CharType>
bool isgraph(
CharType _Ch,
const locale& _Loc
)
参数
_Ch
元素是测试。_Loc
包含元素的区域设置进行测试。
返回值
true,则测试的元素字母数字或标点;false,则不是。
备注
模板函数 use_facet<ctype<返回CharType> >(_Loc)。是(ctype<CharType>或graph,_Ch)。
示例
// locale_is_graph.cpp
// compile with: /EHsc
#include <locale>
#include <iostream>
using namespace std;
int main( )
{
locale loc ( "German_Germany" );
bool result1 = isgraph ( 'L', loc );
bool result2 = isgraph ( '\t', loc );
bool result3 = isgraph ( '.', loc );
if ( result1 )
cout << "The character 'L' in the locale is\n "
<< "an alphanumeric or punctuation character." << endl;
else
cout << "The character 'L' in the locale is\n "
<< " not an alphanumeric or punctuation character." << endl;
if ( result2 )
cout << "The character 'backslash-t' in the locale is\n "
<< "an alphanumeric or punctuation character." << endl;
else
cout << "The character 'backslash-t' in the locale is\n "
<< "not an alphanumeric or punctuation character." << endl;
if ( result3 )
cout << "The character '.' in the locale is\n "
<< "an alphanumeric or punctuation character." << endl;
else
cout << "The character '.' in the locale is\n "
<< " not an alphanumeric or punctuation character." << endl;
}
Output
The character 'L' in the locale is
an alphanumeric or punctuation character.
The character 'backslash-t' in the locale is
not an alphanumeric or punctuation character.
The character '.' in the locale is
an alphanumeric or punctuation character.
要求
页眉: <区域设置>
命名空间: std