OOP vs macro problem

Question

I came across this problem via a colleague today. He had a design for a front end system which goes like this:

class LWindow
{
   //Interface for common meth         


        

Answer 1

I found that

Using the preprocessor #define directive to define constants is not as precise.

[src]

Macros are apparently not as precise, I did not even know that... The classic hidden dangers of the preprocessor like:

#define PI_PLUS_ONE (3.14 + 1)`

By doing so, you avoid the possibility that an order of operations issue will destroy the meaning of your constant:

x = PI_PLUS_ONE * 5;`

Without parentheses, the above would be converted to

x = 3.14 + 1 * 5;

[src]