C++ All-in-One For Dummies, 4th Edition

Chapter 5

Directing the Application Flow

IN THIS CHAPTER

Comparing numbers and evaluating other conditions

Doing things based on a comparison

Repeating code in specific ways

Creating nested loops (loops within loops)

As you program in C++, many times you need to present the computer with a choice, allowing it to do one thing in one situation and something else in another situation. For example, you may have an application that asks for a user’s password. If the password is correct, the application continues; but if the password is incorrect, the application asks the user to reenter the password. After some number of times — usually three — the application performs yet another task when the user enters the incorrect password. Such situations are called conditions. In the case of the password, the condition is whether the password is correct.

You may also encounter situations in which you want several lines of code to run over and over. These are loops, and you can specify conditions under which the loop runs. For example, you may want to check the password only three times; and ...