Chapter 7, Problem 55E

Program Plan Intro

a.

Top-down design process:

• In the top-down design process, the problem is placed on the top of the layer.
• In each succeeding level, it is divided into small problems and is further divided into smaller problems in its sub layer.
• In this method, the problem is systematically broken into small problems, which is more convenient.
• It is complicated to resolve big problems as compared to smaller problems.

Explanation of Solution

b.

Top-down design for finding a telephone number on the Internet:

Sign on to the Internet

Load the search engine.

Enter in "Find phone number"

Load the initial response

Get the phone number

Sign out from the site

E...

Explanation of Solution

c.

Top-down design for finding a telephone number on a scrap of paper that have lost:

Look out the wallets for scrap of paper.

//Performs "WHILE" loop to finding wallets

WHILE (paper is not existing and more wallets are there)

    //Determine next one

Find next one

//If the paper is existing, then

IF (paper is present)

        //Display the given paper

  Paper is found

Look out the waste paper baskets for scrap of paper.

//Performs "WHILE" loop to finding paper baskets

WHILE (paper is not existing and more waste paper baskets are there)

    //Determine next one

Find next one

//If the paper is existing, then

IF (paper is present)

        //Display the given paper

        paper is found

Look out the trash can for scrap of paper...

Explanation of Solution

d.

Difference between above three designs:

Top-down design for finding a telephone number in the phone book	Top-down design for finding a telephone number on the Internet	Top-down design for finding a telephone number on a scrap of paper that have lost
Searching the content in this design is in a repeated number of times.	Searching the content in this design is not in a repeated number of times.	Searching the content in this design is in a repeated number of times...