F452 Modular Programming

Description:

• Each stage in development is completed in blocks/modules. 
• The initial problem is separated into smaller subtasks, tasks are split until a solution can be written. This process is called stepwise refinement.
• One needs a clearly defined interface so that one can expect an outcome.
• The contract between modules is defined in the interface definition.

Advantages:

• Smaller problems are easier to solve, test and understand.
• Debugging is also easier.
• Changes that need to be made are easier to plan.
• Modules can be built by separate teams.
• Code can be written in different languages.
• Modules can be rewritten (ctrl c, ctrl v).

Disadvantages:

• Integration of modules.
• Clashes, eg using different version of a library.
• Testing the interface.