function

std::get_money

template <class moneyT>
/*unspecified*/ get_money (moneyT& mon, bool intl = false);

Get monetary value

Extracts characters from the input stream it is applied to, and interprets them as a monetary expression, which is stored as the value of mon.

Internally, the function accesses the input sequence by first constructing an object of type basic_istream::sentry (with noskipws set to false). Then (if evaluating the sentry object is true), it calls money_get::get (using the stream's selected locale) to perform both the extraction and the parsing operations, and adjusts the stream's internal state flags accordingly. Finally, it destroys the sentry object before returning.

This manipulator is declared in header <iomanip>.

Parameters

mon: Object where the monetary value is stored.
moneyT shall be either long double or a basic_string instantiation.
intl: true for international representations, false otherwise.
This is used internally to instantiate the proper moneypunct class.

Return Value

Unspecified. This function should only be used as a stream manipulator (see example).

Errors are signaled by modifying the stream's internal state flags:

flag	error
`eofbit`	The input sequence has no more characters available (end-of-file reached).
`failbit`	Either no characters were extracted, or the characters extracted could not be interpreted as a valid monetary value.
`badbit`	Error on stream (such as when this function catches an exception thrown by an internal operation). When set, the integrity of the stream may have been affected.

Multiple flags may be set by a single operation.

If the operation sets an internal state flag on the stream that was registered using its member exceptions, the function throws an exception of type ios_base::failure.

Example

// get_money manipulator example
#include <iostream>     // std::cin, std::cout
#include <iomanip>      // std::get_money

int main ()
{
  long double price;
  std::cout << "Please, enter the price: ";
  std::cin >> std::get_money(price);

  if (std::cin.fail()) std::cout << "Error reading price\n";
  else std::cout << "The price entered is: " << price << '\n';

  return 0;
}

Data races

Modifies mon and the stream object from which it is extracted.
Concurrent access to the same stream object may cause data races, except for the standard stream objects cin and wcin when these are synchronized with stdio (in this case, no data races are initiated, although no guarantees are given on the order in which extracted characters are attributed to threads).

Exception safety

Basic guarantee: if an exception is thrown, the object is in a valid state.
It throws an exception of member type failure if the resulting error state flag is not goodbit and member exceptions was set to throw for that state.
Any exception thrown by an internal operation is caught and handled by the function, setting badbit. If badbit was set on the last call to exceptions, the function rethrows the caught exception.

std::get_money

Parameters

Return Value

Example

Data races

Exception safety

See also

C++

Reference

C library:

Containers:

Input/Output:

Multi-threading:

Other:

<iomanip>