CHAPTER 15 IMPLEMENTATION

The section on 4GLs (Section 15.2) is important, if only because many students are unaware that 4GLs exist, let alone their important role in the software industry; students are frequently equally unaware of coding standards (Section 15.4). The material on the test workflow (Sections 15.9 through 15.22) is vital. Students taking a course in software engineering generally have been programming for at least 3 years, but they have little or no knowledge of systematic testing.

PROBLEM SOLUTIONS

15.1: (Term Project): Key point: This is essentially a data-processing (DP) product, with

clients accessing a database on a server. The provider terminal software is an example of embedded software. It is possibly a mobile device. C/C++ or Java is a good choice of implementation language. Ada Benefits: truly portable; strongly typed; supports modularity; excellent file handling capa-bilities; supports abstraction; facilitates implementation of object-oriented design. Costs: unfamiliar to most DP programmers. BASIC Benefits: quick and easy to use; highly interactive; good string handling; good for DP

purposes. Costs: no standard; not modular; slow to execute; not very portable. C/C++ Benefits: powerful constructs; widely available; modular; highly portable; C++ facilitates

implementation of object-oriented design and hence reuse. There are C compilers for most microprocessors, and many database APIs are available. Costs: easy to write dangerous code; low-level file handling; hard to maintain unless

carefully written in a style that does not use ―fancy‖ features.