unformatted I/O summary

std::ostream	std::cout;	// predefined
	cout.put( c );	// single bytes
	cout.write( array, count );	// byte array
std::istream	std::cin;	// predefined
	c = cin.get( );	// single bytes
	cin.read( array, count );	// byte array

low-level I/O
highest efficiency
individual character processing
"end-of-file" marker EOF
multiple lines of text
no automatic whitespace processing