What is macro pre-processor? Explain steps of macropreprocessor design

A macro preprocessor is a program that processes its input data to produce output that is used as input to another program. The output is a version of the original input data that has been translated or expanded by the macro preprocessor.

The macro preprocessor is most commonly used in software development where it is used to allow the easy reuse of code. This is done by defining 'macros' which are essentially templates of code that can be inserted into a program.

The steps of macro preprocessor design are as follows:

1. Definition of Macros: The first step in the design of a macro preprocessor is the definition of macros. This involves identifying the sections of code that are to be reused and defining them as macros.

2. Expansion of Macros: Once the macros have been defined, the next step is to expand them. This involves replacing the macro calls in the program with the actual macro definition.

3. Integration of Macros: After the macros have been expanded, they are integrated into the program. This involves inserting the expanded macros into the appropriate places in the program.

4. Compilation and Execution: The final step in the design of a macro preprocessor is the compilation and execution of the program. This involves compiling the program with the integrated macros and then executing it.

In summary, a macro preprocessor is a tool that allows for the easy reuse of code through the use of macros. The design of a macro preprocessor involves the definition, expansion, integration, and execution of these macros.