Click here for more information of preprocessor statements, including macros . Lets now examine a few examples of using these symbolic constants in our programs. This is illegal . You cannot re-assign a new value to a symbolic constant. As shown above, the preprocessor performs literal substitution of symbolic constants.
Lets modify the previous program slightly, and introduce an error to highlight a problem.
This would make changes difficult, because you would need to search and replace every occurrence in the program. All rights reserved.