Techniques for File I/O
The programming style for file i/o is different from that used for i/o using the keyboard and screen
When your program takes its input from a file you should not include prompt lines or echoing of input
When reading input from a files you must be certain that the data in the file is exactly the kind of data and in the order that the program expects
You may have any number of streams opened for input or for output (not exactly - there is typically a limit of <= 1024)