Summary

In this chapter, we looked at the use of C++ functions as a major program-building tool. For a given functionality of the program, there exist numerous ways of implementing that functionality in C++ code.

The goal of allocating jobs to functions is to arrive at a program whose functions can be understood and maintained in isolation from other functions and are easy to reuse in other contexts. Everything that requires the client designer (or maintainer) to read the code in several places for understanding and modification, impedes reuse and maintenance.