2.1.3 Thinking Procedurally

Question 1

Decomposition

Answer 1

• the first stage of thinking procedurally
• breaking down a large complex problem into smaller more manageable subproblems which can be solved more easily
• the project becomes easier to manage and can be divided between a team
• top down design is one method of decomposing a problem

Question 2

Decomposition example

Answer 2

• games can be divided into sub programs [1]
• sub programs can then be programmed as subroutines [1]

Question 3

Top down design

Answer 3

• divided problems into levels of complexity
• problems are broken down into smaller sub problems until each problem is a single task and ideally a self contained module or subroutine
• each sub problem can be solved using a single subroutine

Question 4

Subroutine benefits

Answer 4

• subroutines can be developed and tested separately so they are self contained
• thus each subroutine is much simpler to test and maintain [1]
• subroutines can be reused to prevent duplicate code [1]