This is a very exciting chapter. While command line interfaces (CLI) may not have the cachet of modern graphical user interfaces (GUI), especially those of phones, tablets, or the Web, the CLI is still a remarkably useful and effective user interface. This chapter details the design and implementation of the command line interface for pdCalc. By the end of this chapter, we will, for the first time, have a functioning, albeit feature incomplete, calculator, a significant milestone in our development.
5.1 The User Interface Abstraction
While we could design a fully functioning CLI in ...
