std::streamsize
From cppreference.com
| Defined in header
<ios>
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| typedef /*unspecified*/ streamsize;
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The type std::streamsize is a signed integral type used to represent the number of characters transferred in an I/O operation or the size of an I/O buffer. It is used as a signed counterpart of std::size_t, similar to the POSIX type ssize_t.
Except in the constructors of std::strstreambuf, negative values of std::streamsize are never used.
[edit] See also
| returns number of characters extracted by last unformatted input operation (public member function of std::basic_istream)
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| extracts and discards characters until the given character is found (public member function of std::basic_istream)
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| extracts blocks of characters (public member function of std::basic_istream)
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| inserts blocks of characters (public member function of std::basic_ostream)
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