Difference between revisions of "cpp/io/manip/get money"
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{{cpp/title|get_money}} | {{cpp/title|get_money}} | ||
{{cpp/io/manip/navbar}} | {{cpp/io/manip/navbar}} | ||
| − | {{ddcl | header=iomanip | since=c++11 |1= | + | {{ddcl|header=iomanip|since=c++11|1= |
template< class MoneyT > | template< class MoneyT > | ||
/*unspecified*/ get_money( MoneyT& mon, bool intl = false ); | /*unspecified*/ get_money( MoneyT& mon, bool intl = false ); | ||
}} | }} | ||
| − | When used in an expression {{c|in >> get_money(mon, intl)}}, parses the character input as a monetary value, as specified by the {{lc|std::money_get}} facet of the locale currently imbued in {{ | + | When used in an expression {{c|in >> get_money(mon, intl)}}, parses the character input as a monetary value, as specified by the {{lc|std::money_get}} facet of the locale currently imbued in {{c|in}}, and stores the value in {{c|mon}}. |
| − | + | The extraction operation in {{c|in >> get_money(mon, intl)}} behaves as a {{named req|FormattedInputFunction}}. | |
===Parameters=== | ===Parameters=== | ||
{{par begin}} | {{par begin}} | ||
| − | {{par | mon | variable where monetary value will be written. Can be either {{c|long double}} or {{ | + | {{par|mon|variable where monetary value will be written. Can be either {{c|long double}} or {{lc|std::basic_string}}}} |
| − | {{par | intl | expects to find required international currency strings if {{c|true}}, expects optional currency symbols otherwise}} | + | {{par|intl|expects to find required international currency strings if {{c|true}}, expects optional currency symbols otherwise}} |
{{par end}} | {{par end}} | ||
===Return value=== | ===Return value=== | ||
| − | + | {{cpp/io/manip/iomanip return value|get_money}} | |
| − | + | ||
| − | + | ||
| − | + | ||
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| − | + | ||
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| − | }} | + | |
===Example=== | ===Example=== | ||
{{example | {{example | ||
| − | + | |code= | |
| − | + | #include <iomanip> | |
#include <iostream> | #include <iostream> | ||
| + | #include <locale> | ||
#include <sstream> | #include <sstream> | ||
| − | + | ||
| − | + | ||
int main() | int main() | ||
{ | { | ||
| Line 43: | Line 32: | ||
long double v1, v2; | long double v1, v2; | ||
std::string v3; | std::string v3; | ||
| + | |||
in.imbue(std::locale("en_US.UTF-8")); | in.imbue(std::locale("en_US.UTF-8")); | ||
in >> std::get_money(v1) >> std::get_money(v2) >> std::get_money(v3, true); | in >> std::get_money(v1) >> std::get_money(v2) >> std::get_money(v3, true); | ||
| − | + | ||
| − | std::cout << | + | if (in) |
| − | + | std::cout << std::quoted(in.str()) << " parsed as: " | |
| + | << v1 << ", " << v2 << ", " << v3 << '\n'; | ||
| + | else | ||
| + | std::cout << "Parse failed"; | ||
} | } | ||
| − | + | |output= | |
"$1,234.56 2.22 USD 3.33" parsed as: 123456, 222, 333 | "$1,234.56 2.22 USD 3.33" parsed as: 123456, 222, 333 | ||
}} | }} | ||
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===See also=== | ===See also=== | ||
{{dsc begin}} | {{dsc begin}} | ||
| − | {{dsc inc | cpp/locale/dsc money_get}} | + | {{dsc inc|cpp/locale/dsc money_get}} |
| − | {{dsc inc | cpp/io/manip/dsc put_money}} | + | {{dsc inc|cpp/io/manip/dsc put_money}} |
{{dsc end}} | {{dsc end}} | ||
| − | + | {{langlinks|de|es|fr|it|ja|pt|ru|zh}} | |
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Latest revision as of 22:29, 15 September 2023
| Defined in header <iomanip>
|
||
| template< class MoneyT > /*unspecified*/ get_money( MoneyT& mon, bool intl = false ); |
(since C++11) | |
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.
The extraction operation in in >> get_money(mon, intl) behaves as a FormattedInputFunction.
Contents |
[edit] Parameters
| mon | - | variable where monetary value will be written. Can be either long double or std::basic_string |
| intl | - | expects to find required international currency strings if true, expects optional currency symbols otherwise |
[edit] Return value
An object of unspecified type such that
- if in is an object of type std::basic_istream<CharT, Traits>, the expression in >> get_money(mon, intl)
- has type std::basic_istream<CharT, Traits>&
- has value in
- behaves as if it called f(in, mon, intl)
where the function f is defined as:
template<class CharT, class Traits, class MoneyT> void f(std::basic_ios<CharT, Traits>& str, MoneyT& mon, bool intl) { using Iter = std::istreambuf_iterator<CharT, Traits>; using MoneyGet = std::money_get<CharT, Iter>; std::ios_base::iostate err = std::ios_base::goodbit; const MoneyGet& mg = std::use_facet<MoneyGet>(str.getloc()); mg.get(Iter(str.rdbuf()), Iter(), intl, str, err, mon); if (err != std::ios_base::goodbit) str.setstate(err); }
[edit] Example
Run this code
#include <iomanip> #include <iostream> #include <locale> #include <sstream> 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); if (in) std::cout << std::quoted(in.str()) << " parsed as: " << v1 << ", " << v2 << ", " << v3 << '\n'; else std::cout << "Parse failed"; }
Output:
"$1,234.56 2.22 USD 3.33" parsed as: 123456, 222, 333
[edit] See also
| parses and constructs a monetary value from an input character sequence (class template) | |
| (C++11) |
formats and outputs a monetary value (function template) |
