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DEV-C is a fully-featured integrated development environment (IDE) for creating, debugging and creating applications written in a popular C programming language. Even though tools for the development of C software have undergone countless upgrades over the years, a large number of developers located all around the world have expressed a wish to continue using DEV-C. Cannot Get Dev-C to compile correctly Home. Programming Forum. Just not to overlook the obvious, but did you search the directory where you installed Dev-C for 'iostream' to make sure iostream.h and iostream.cpp are there? Dave Sinkula 2,398 13 Years Ago. It just does not read iostream.h file.

Declares objects that control reading from and writing to the standard streams. This include is often the only header you need to do input and output from a C++ program.

Syntax

Because of standards section 17.4.1.2 (“Headers”) in ISO/IEC “Information technology -Programming languages - C”, the open source libstdc library does not have an iostream.h header file. Solution: Use the iostream header file name (without the.h file type).
Feb 26, 2008 General C Programming; fstream in devc. Fstream in devc. I've read all the fstream tutorials, and none of the code works in devc 4.9.9.2. For example here is a function I'm working on. The code I have to convert a string to char works. It's the fstream stuff that throws off a 'no matching function for call to `std.

Note

The <iostream> library uses the #include <ios>, #include <streambuf>, #include <istream>, and #include <ostream> statements.

Remarks

The objects fall into two groups:

cin, cout, cerr, and clog are byte oriented, doing conventional byte-at-a-time transfers.
wcin, wcout, wcerr, and wclog are wide oriented, translating to and from the wide characters that the program manipulates internally.

Once you do certain operations on a stream, such as the standard input, you can't do operations of a different orientation on the same stream. Therefore, a program can't operate interchangeably on both cin and wcin, for example.

All the objects declared in this header share a peculiar property — you can assume they're constructed before any static objects you define, in a translation unit that includes <iostream>. Equally, you can assume that these objects aren't destroyed before the destructors for any such static objects you define. (The output streams are, however, flushed during program termination.) Therefore, you can safely read from or write to the standard streams before program startup and after program termination.

This guarantee isn't universal, however. A static constructor may call a function in another translation unit. The called function can't assume that the objects declared in this header have been constructed, given the uncertain order in which translation units participate in static construction. To use these objects in such a context, you must first construct an object of class ios_base::Init.

Global Stream Objects

cerr	Specifies the `cerr` global stream.
cin	Specifies the `cin` global stream.
clog	Specifies the `clog` global stream.
cout	Specifies the `cout` global stream.
wcerr	Specifies the `wcerr` global stream.
wcin	Specifies the `wcin` global stream.
wclog	Specifies the `wclog` global stream.
wcout	Specifies the `wcout` global stream.

cerr

The object cerr controls output to a stream buffer associated with the object stderr, declared in <cstdio>.

Return Value

An ostream object.

Remarks

The object controls unbuffered insertions to the standard error output as a byte stream. Once the object is constructed, the expression cerr.flags&unitbuf is nonzero, and cerr.tie() &cout.

Declaration

Following is the declaration for iosstream function.

C++98

C++ Include Iostream

C++11

Objects

The objects of iosstream should be like this −

Narrow characters (char)

Sr.No.	Characters	Definition
1	cin	Standard input stream
2	cout	Standard output stream
3	cerr	Standard output stream for errors
4	clog	Standard output stream for logging

Wide characters (wchar_t)

C++ Iostream Example

Sr.No.	Characters	Definition
1	wcin	Standard input stream (wide)
2	wcout	SStandard output stream (wide)
3	wcerr	Standard output stream for errors (wide-oriented)
4	wclog	Standard output stream for logging (wide)

Syntax

Remarks

Global Stream Objects

cerr

Return Value

Remarks

Example

cin

Return Value

Remarks

Example

clog

Return Value

Remarks

Example

cout

Return Value

Remarks

Example

wcerr

Return Value

Remarks

Example

wcin

Return Value

Remarks

Example

wclog

Return Value

Remarks

Example

wcout

Return Value

Remarks

Example

See also

Description

Declaration

C++98

C++ Include Iostream

C++11

Objects

Narrow characters (char)

Wide characters (wchar_t)

C++ Iostream Example

Dev C++ Iostream H