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Input/output manipulators

Manipulators are helper functions that make it possible to control input/output streams using operator<< or operator>>.

The manipulators that are invoked without arguments (e.g. std::cout << std::boolalpha; or std::cin >> std::hex;) are implemented as functions that take a reference to a stream as their only argument. The special overloads of basic_ostream::operator<< and basic_istream::operator>> accept pointers to these functions. These functions (or instantiations of function templates) are the only addressable functions in the standard library. (since C++20).

The manipulators that are invoked with arguments (e.g. std::cout << std::setw(10);) are implemented as functions returning objects of unspecified type. These manipulators define their own operator<< or operator>> which perform the requested manipulation.

Defined in header <ios>
switches between textual and numeric representation of booleans
(function)
controls whether prefix is used to indicate numeric base
(function)
controls whether decimal point is always included in floating-point representation
(function)
controls whether the + sign used with non-negative numbers
(function)
controls whether leading whitespace is skipped on input
(function)
controls whether uppercase characters are used with some output formats
(function)
controls whether output is flushed after each operation
(function)
sets the placement of fill characters
(function)
changes the base used for integer I/O
(function)
(C++11)(C++11)
changes formatting used for floating-point I/O
(function)
Defined in header <istream>
consumes whitespace
(function template)
Defined in header <ostream>
outputs '\0'
(function template)
flushes the output stream
(function template)
outputs '\n' and flushes the output stream
(function template)
(C++20)
controls whether a stream's basic_syncbuf emits on flush
(function template)
(C++20)
flushes a stream and emits the content if it is using a basic_syncbuf
(function template)
Defined in header <iomanip>
clears the specified ios_base flags
(function)
sets the specified ios_base flags
(function)
changes the base used for integer I/O
(function)
changes the fill character
(function template)
changes floating-point precision
(function)
changes the width of the next input/output field
(function)
(C++11)
parses a monetary value
(function template)
(C++11)
formats and outputs a monetary value
(function template)
(C++11)
parses a date/time value of specified format
(function template)
(C++11)
formats and outputs a date/time value according to the specified format
(function template)
(C++14)
inserts and extracts quoted strings with embedded spaces
(function template)

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