C++ Library -

Introduction

It is an output stream objects can write sequences of characters and represent other kinds of data. Specific members are provided to perform these output operations.

Definition

Below is definition of std::ostream.

typedef basic_ostream<char> ostream;

Parameters

• charT − Character type.
• traits − Character traits class that defines essential properties of the characters used by stream objects.

Member types

S.N.	Member types	Definition
1	event	Type to indicate event type
2	event_callback	Event callback function type
3	failure	Base class for stream exceptions
4	fmtflags	Type for stream format flags
5	Init	Initialize standard stream objects
6	iostate	Type for stream state flags
7	openmode	Type for stream opening mode flags
8	seekdir	Type for stream seeking direction flag
9	basic_istream::sentry	It is used to prepare stream for input
10	seekdirbasic_ostream::sentry	It is used to prepare stream for output

Public Member Functions

S.N.	Member types	Definition
1	(constructor)	Construct object (public member function )
2	(destructor)	Destruct object (public member function )

Public member functions

S.N.	Member Functions	Definition
1	gcount	It is used to get character count
2	get	It is used to get characters
3	getline	It is used to get line
4	ignore	It is used to extract and discard characters
5	peek	It is used to peek next character
6	read	It is used to read block of data
7	readsome	It is used to Read data available in buffer
8	putback	It is used to put character back
9	unget	It is used to unget character

Formatted output

S.N.	Output	Definition
1	operator>>	It is used to extract formatted input

Unformatted output

S.N.	Output	Definition
1	put	It is used to put character
2	write	It is used to write block of data

Positioning

S.N.	Position	Definition
1	tellp	It is used to get position in output sequence
2	seekp	It is used to set position in output sequence

Synchronization

S.N.	Synchronization	Definition
1	flush	It is used to flush output stream buffer

Protected member functions

S.N.	Member Functions	Definition
1	operator=	It is used to move assignment
2	swap	It is used to swap internals

Public member functions inherited from basic_ios

S.N.	Member types	Definition
1	good	It is used to check whether state of stream is good
2	eof	It is used to check whether eofbit is set
3	fail	It is used to check whether either failbit or badbit is set
4	bad	It is used to check whether badbit is set
5	operator!	Evaluate stream
6	rdstate	It is used to get error state flags
7	setstate	It is used to set error state flag
8	clear	It is used to set error state flag
9	fill	Get/set fill character
10	exceptions	It is used to get/set exceptions mask
11	imbue	Imbue locale
12	tie	It is used to get/set tied stream
13	rdbuf	It is used to get/set stream buffer
14	narrow	Narrow character
15	widen	Widen character