Students' Guide to Program Design

Modularization

7.3 Steps in modularization

Top-down modular design is really quite simple if the following steps

are performed every time a programmer is presented with a

programming problem:

1

Define

the problem by dividing it into its three components: input,

output and processing. The processing component should consist

of

a

list of activities to be performed.

2

Group

the activities into subtasks or functions to determine the

modules which will make up the program. Remember that a

module is one section of a program dedicated to the performance

of a single function. Note that not all the activities may be

identified at this stage. Only th ...