std::get_money

来自cppreference.com
< cpp‎ | io‎ | manip

定义于头文件 <iomanip>
template< class MoneyT >
/*unspecified*/ get_money( MoneyT& mon, bool intl = false );
(C++11 起)

When used in an expression in >> get_money(mon, intl), parses the character input as a monetary value, as specified by the std::money_get facet of the locale currently imbued in in, and stores the value in mon.

This function behaves as a formatted input function.

目录

[编辑] 参数

mon - variable where monetary value will be written. Can be either long double or basic_string
intl - expects to find required international currency strings if true, expects optional currency symbols otherwise

[编辑] 返回值

返回in是,如果一个输出流的类型std::basic_istream<CharT, Traits>的名称,然后表达in >> get_money(mon, intl)的行为,如果下面的代码被执行对象的类型不明确
原文:
Returns an object of unspecified type such that if in is the name of an output stream of type std::basic_istream<CharT, Traits>, then the expression in >> get_money(mon, intl) behaves as if the following code was executed:
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typedef std::istreambuf_iterator<CharT, Traits> Iter;
typedef std::money_get<CharT, Iter> MoneyGet;
std::ios_base::iostate err = std::ios_base::goodbit;
const MoneyGet &mg = std::use_facet<MoneyGet>(in.getloc());
mg.get(Iter(in.rdbuf()), Iter(), intl, in, err, mon);
if (std::ios_base::goodbit != err)
    out.setstate(err);

[编辑] 示例

#include <iostream>
#include <sstream>
#include <locale>
#include <iomanip>
int main()
{
    std::istringstream in("$1,234.56 2.22 USD  3.33");
    long double v1, v2;
    std::string v3;
    in.imbue(std::locale("en_US.UTF-8"));
    in >> std::get_money(v1) >> std::get_money(v2) >> std::get_money(v3, true);
 
    std::cout << '"' << in.str() << "\" parsed as: "
              << v1 << ", " << v2 << ", " << v3 << '\n';
}

输出:

"$1,234.56 2.22 USD  3.33" parsed as: 123456, 222, 333

[编辑] 另请参阅

从输入字符序列剖析并构造货币值
(类模板) [编辑]
(C++11)
格式化并输出货币值
(函数模板) [编辑]