std::numpunct

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C++
 
本地化库
语言环境方面
Original:
Locales and facets
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locale
字符分类
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Character classification
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转换
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Conversions
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wstring_convert（C++11）
wbuffer_convert（C++11）
小面类的基类
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Facet category base classes
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小面类
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Facet categories
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特定于语言环境的方面
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Locale-specific facets
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代码转换方面
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Code conversion facets
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codecvt_utf8（C++11）
codecvt_utf16（C++11）
codecvt_utf8_utf16（C++11）
codecvt_mode（C++11）
C语言环境
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C locale
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std::numpunct
 
Defined in header <locale>
template< class CharT >
class numpunct;
方面std::numpunct封装数字标点符号的喜好。流I / O操作使用std::numpunctstd::num_getstd::num_put为，解析数字输入和格式的数字输出.
Original:
The facet std::numpunct encapsulates numeric punctuation preferences. Stream I/O operations use std::numpunct through std::num_get and std::num_put for parsing numeric input and formatting numeric output.
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cpp/locale/locale/facetstd-numpunct-inheritance.svg
关于这幅图像

Inheritance diagram

两个专业所提供的标准库
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Two specializations are provided by the standard library
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Defined in header <locale>
std::numpunct<char>
提供等值的“C”语言环境的偏好
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provides equivalents of the "C" locale preferences
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std::numpunct<wchar_t>
提供宽字符当量的“C”语言环境的偏好
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provides wide character equivalents of the "C" locale preferences
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目录

[编辑] 会员类型

会员类型
Original:
Member type
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 Definition
char_type charT
string_type std::basic_string<charT>

[编辑] 成员函数
构造一个新numpunct方面
Original:
constructs a new numpunct facet
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（公共成员函数） [edit]
解构一个numpunct方面
Original:
destructs a numpunct facet
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（受保护的成员函数） [edit]
调用do_decimal_point
Original:
invokes do_decimal_point
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（公共成员函数） [edit]
调用do_thousands_sep
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invokes do_thousands_sep
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（公共成员函数） [edit]
调用do_grouping
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invokes do_grouping
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（公共成员函数） [edit]
调用do_truename
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invokes do_truename
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（公共成员函数） [edit]
调用do_falsename
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invokes do_falsename
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（公共成员函数） [edit]

[编辑] 受保护的成员函数

[虚拟的] </ SPAN></div></div>
提供要使用的字符作为小数点
Original:
provides the character to use as decimal point
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（虚拟保护成员函数） [edit]
[虚拟的] </ SPAN></div></div>
使用千位分隔符的字符
Original:
provides the character to use as thousands separator
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（虚拟保护成员函数） [edit]
[虚拟的] </ SPAN></div></div>
每个对成千上万之间提供的数字的位数 分隔符
Original:
provides the numbers of digits between each pair of thousands separators
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（虚拟保护成员函数） [edit]
[虚拟的] </ SPAN></div></div>
提供该字符串的布尔true使用的名称
Original:
provides the string to use as the name of the boolean true
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（虚拟保护成员函数） [edit]
[虚拟的] </ SPAN></div></div>
提供该字符串的布尔false使用的名称
Original:
provides the string to use as the name of the boolean false
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（虚拟保护成员函数） [edit]

[编辑] 会员对象

static std::locale::id id
“ID”的语言环境
Original:
id of the locale
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（公共成员对象）

[编辑] 为例

下面的示例更改true和false的字符串表示形式
Original:
The following example changes the string representations of true and false
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#include <iostream>
#include <locale>
 
struct french_bool : std::numpunct<char> {
    string_type do_truename() const { return "oui"; }
    string_type do_falsename() const { return "non"; }
};
 
int main()
{
    std::cout << "default locale: "
              << std::boolalpha << true << ", " << false << '\n';
    std::cout.imbue(std::locale(std::cout.getloc(), new french_bool()));
    std::cout << "locale with modified numpunct: "
              << std::boolalpha << true << ", " << false << '\n';
}

Output: 

default locale: true, false
locale with modified numpunct: oui, non

[编辑] 另请参阅
创建名为locale的一个numpunct方面的
Original:
creates a numpunct facet for the named locale
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（类模板）

来自“http://zh.cppreference.com/mwiki/index.php?title=cpp/locale/numpunct&oldid=27897”