Streams

A stream is an infinite data stream on which you can push or pull data. String streams and file streams enable strings and files to interact with the stream directly.

String Streams

String streams need the header <sstream>. They are not connected to an input or output stream and store their data in a string.

Whether you use a string stream for input or output or with the character type char or wchar_t there are various string stream classes:

std::istringstream and std::wistringstream

String stream for the input of data of type char and wchar_t.

std::ostringstream and std::wostringstream

String stream for the output of data of type char and wchar_t.

std::stringstream and std::wstringstream

String stream for the input or output of data of type char and wchar_t.

Typical operations on a string stream are:

• Write data in a string stream:

std::stringstream os;
os << "New String";
os.str("Another new String");

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