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It's a bit difficult to show a class hierarchy using unformatted text alone, so I'll use the scope resolution operator to show the relationships instead.

Note: [] denotes multiple inheritance

ios_base

ios_base::ios

ios_base::ios::istream

ios_base::ios::ostream:

ios_base::ios::istream::ifstream

ios_base::ios::ostream::ofstream

ios_base::ios::[istream/ostream]::iostream

ios_base::ios::[istream/ostream]::iostream::fstream

ios_base::ios::[istream/ostream]::iostream::stdiostream

ios_base::ios::[istream/ostream]::iostream::stringstream

streambuf

streambuf::filebuf

streambuf::stdiobuf

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10y ago
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10y ago

A stream is a stream of data. C++ supports input and output streams. Data can be extracted from an input stream and inserted into an output stream. Streams can be specialised for specific types of data, such as file streams (typically binary or character data) and string streams (character data).

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13y ago

Streams has nothing to do with C++. They are a platform / library issue. You can have streams in any language.

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Q: What is stream in C plus plus?
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The file stream classes (ifstream and ofstream) are derivatives of the I/O stream classes (istream and ostream) that are specific to file input and output.


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