Chapter 4 Overview

Up to this point, our programs—whether defined in a function main() or an ApiMain()—have had the property that each time they are run, the exact same sequence of statements is executed. Execution begins with the first statement in the function and proceeds in a straight-line manner to the last statement in the function with every statement along the way being executed once. This form of programming is adequate for solving simple problems. However, for general problem solving we need the ability to control which statements are executed and how often. In this chapter, we consider two conditional constructs—the if and switch—that control whether a statement list is executed and three iterative constructs—the while, for, and do—that control how many times a statement list is executed. Except for the switch construct, which performs a matching process to determine which statements are executed, these control constructs use logical expressions to determine their course of action. To sup-port these constructs, C++ has the logical type bool. Our control construct examination begins with logical expressions and the type bool.

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