std::left, std::right, std::internal - cppreference.com (original) (raw)
| Defined in header | | | | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | --- | | | std::ios_base& left( std::ios_base& str ); | (1) | | | std::ios_base& right( std::ios_base& str ); | (2) | | | std::ios_base& internal( std::ios_base& str ); | (3) | |
Modifies the positioning of the fill characters in an output stream. left and right apply to any type being output, internal applies to integer, floating-point, and monetary output. Has no effect on input.
The initial default for standard streams is equivalent to right.
This is an I/O manipulator. It may be called with an expression such as out << std::left for any out of type std::basic_ostream or with an expression such as in >> std::left for any in of type std::basic_istream.
[edit] Parameters
| str | - | reference to I/O stream |
|---|
[edit] Return value
str (reference to the stream after manipulation).
[edit] Example
Output:
Default positioning: *******-1.23 0x2a USD 1.23 Left positioning: -1.23 0x2a*** USD 1.23** Internal positioning: -*1.23 0x**2a USD ****1.23 Right positioning: *******-1.23 ********0x2a ***USD *1.23