<Table> <Tr> <Td> </Td> <Td> This article may require cleanup to meet Wikipedia's quality standards . The specific problem is: Talks about a header, when it should talk about input / output streams Please help improve this article if you can . (March 2012) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This article may require cleanup to meet Wikipedia's quality standards . The specific problem is: Talks about a header, when it should talk about input / output streams Please help improve this article if you can . (March 2012) (Learn how and when to remove this template message) </Td> </Tr> <P> C++ input / output streams are primarily defined by iostream, a header file that is part of the C++ standard library (the name stands for Input / Output Stream). In C++ and its predecessor, the C programming language, there is no special syntax for streaming data input or output . Instead, these are combined as a library of functions . Like the cstdio header inherited from C's stdio. h, iostream provides basic input and output services for C++ programs . iostream uses the objects cin, cout, cerr, and clog for sending data to and from the standard streams input, output, error (unbuffered), and log (buffered) respectively . As part of the C++ standard library, these objects are a part of the std namespace . </P> <P> The cout object is of type ostream, which overloads the left bit - shift operator to make it perform an operation completely unrelated to bitwise operations, and notably evaluate to the value of the left argument, allowing multiple operations on the same ostream object, essentially as a different syntax for method cascading, exposing a fluent interface . The cerr and clog objects are also of type ostream, so they overload that operator as well . The cin object is of type istream, which overloads the right bit - shift operator . The directions of the bit - shift operators make it seem as though data is flowing towards the output stream or flowing away from the input stream . </P>

What is the meaning of iostream in c++
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