C++ assertions

In this project, we will be using C++ assertions. As usual, there is more to this topic than we will discuss here, but we can still do some useful things with just an introduction.

We can use the #define preprocessor statement in a class to define a value for the entire project. We do so with the following code:

#define debuggingOnConsole

This code would be written at the top of a header file. Now, throughout the project, we can write code like the following:

#ifdef debuggingOnConsole
    // C++ code goes here
#endif

The #ifdef debuggingOnConsole statement checks whether the #define debuggingOnConsole statement is present. If it is, then any C++ code up to the #endif statement will be included in the game. We can then choose to comment out the #define statement to switch our debugging code on or off.

Typically, we will include code such as the following in the #ifdef blocks:

#ifdef debuggingOnConsole     ...