Students' Guide to Program Design

Students' Guide to

Program

Design

Sequential cohesion is stronger than communicational cohesion

because it is more problem oriented. Its weakness lies only in the fact

that the module may perform multiple functions, or fragments of

functions.

A pseudocode example of

a

sequentially cohesive module follows:

Process-Purchases

Set total-purchases to zero

Read number-of-purchases

DO loop-index =

1

to number-of-purchases

get purchase

add purchase to total-purchases

ENDDO

discount = total-purchases • discount-percent

amount-due = total-purchases - discount

END

Note that this module firstly calculates total-purchases and then

uses the variable total-purchase ...