std::showpoint, std::noshowpoint - cppreference.com (original) (raw)

| Defined in header | | | | ----------------------------------------------------------------------------------------------- | --- | | | std::ios_base& showpoint( std::ios_base& str ); | (1) | | | std::ios_base& noshowpoint( std::ios_base& str ); | (2) | |

Enables or disables the unconditional inclusion of the decimal point character in floating-point output. Has no effect on input.

1. Enables the showpoint flag in the stream str as if by calling str.setf(std::ios_base::showpoint).

2. Disables the showpoint flag in the stream str as if by calling str.unsetf(std::ios_base::showpoint).

This is an I/O manipulator, it may be called with an expression such as out << std::showpoint for any out of type std::basic_ostream or with an expression such as in >> std::showpoint for any in of type std::basic_istream.

The character to use as decimal point character is determined by the numpunct facet of the locale imbued in the stream at the time of output, as described in std::num_put::put.

[edit] Parameters

[edit] Return value

str (reference to the stream after manipulation).

[edit] Example

#include   int main() { std::cout << "1.0 with showpoint: " << std::showpoint << 1.0 << '\n' << "1.0 with noshowpoint: " << std::noshowpoint << 1.0 << '\n'; }

Output:

1.0 with showpoint: 1.00000 1.0 with noshowpoint: 1

[edit] See also