<ostream>
The <ostream>
header declares the output stream class template,
specializations, and manipulators.
See <fstream>
for derived
classes that write to files and <sstream>
for derived classes that write
to strings. See <ios>
for the
base-class declarations. See <string>
for information about the
char_traits
template. Refer to Chapter 9 for general information about
I/O.
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