ostream
These methods write on an ostream (you may also use the operator
<<; see section Operators and Default Streams).
Method: ostream& ostream::put (char c)
Write the single character c.
Method: ostream& ostream::write (string, int length)
Write length characters of a string to this ostream,
beginning at the pointer string.
string may have any of these types: char*, unsigned
char*, signed char*.
Method: ostream& ostream::form (const char *format, ...)
A GNU extension, similar to fprintf(file,
format, ...).
format is a printf-style format control string, which is used
to format the (variable number of) arguments, printing the result on
this ostream. See ostream::vform for a version that uses
an argument list rather than a variable number of arguments.
Method: ostream& ostream::vform (const char *format, va_list args)
A GNU extension, similar to vfprintf(file,
format, args).
format is a printf-style format control string, which is used
to format the argument list args, printing the result on
this ostream. See ostream::form for a version that uses a
variable number of arguments rather than an argument list.