Procedural C++ That Extends Pascal

Equipped with the C++ subset that covers Pascal, one can write any program in C++ that could have been written in Pascal. Reading code that others have written, however, leads to a discovery of additional operators, the use of dynamic allocation to enable the definition of nonlocal variables (i.e., nonlinked storage with a lifetime exceeding that of the function), and new capabilities of functions beyond those in Pascal. These are the topics discussed in Sections 3.1, 3.2, and 3.3, respectively. The purpose of this chapter is not to provide an exhaustive survey of the entire nonobject part of C++ (which includes C). The aim is to highlight those useful language structures that are characteristic of C++ that lack direct analogues in Pascal.