Basic Programming Principles (2nd Edition) Chapter 3 Exercise Answers

Chapter 3 Answers

Exercises Page 48

Question 1

1.1

Planning:
Description Type Variable name
Input Name of item string name
Price of item real price
Output Name of item String name
Price of item real price

IPO chart:
Input Processing Output
name Prompt for input data name
price Enter input data price
Display output data

Algorithm:

ShowItemData
~ get the input
display “Provide the name” ~ on new line
enter name
display “Provide the price” ~ on new line
enter price
~ show output on screen
display “The name of the item is “, name ~ on new line
display “The price of the item is R”, price ~ on new line
end

Trace Table:

Test data: name = t-shirt and price = R29.70

Instruction name price output
display Provide the name
enter t-shirt
display Provide the price
enter 24.70
display The name of the item is t-shirt
display The price of the item is R29.70




Basic Programming Principles Second Edition Chapter 3 Answers
Page 1 of 12

, 1.2

Planning:
Description Type Variable name
Input First number integer number1
Second number integer number2
Output Sum of numbers integer sum
Difference between numbers integer difference
Product of numbers integer product

IPO chart:
Input Processing Output
number1 Prompt for 2 numbers sum
number2 Enter input numbers difference
Calculate output values product
Display output values

Algorithm:

ShowItemData
~ get the input
display “Provide the first number” ~ on new line
enter number1
display “Provide the second number” ~ on new line
enter number2
~ do calculations
sum = number1 + number2
difference = number1 – number2
product = number1 * number2
~ show output on screen
display “The sum is “, sum ~ on new line
display “The difference is ”, difference ~ on new line
display “The product is “, product ~ on new line
end

1.3

Planning:
Description Type Variable name
Input Number chairs per row Integer chairs
Number of rows integer rows
Output Total number of chairs integer totalChairs

IPO chart:
Input Processing Output
chairs Prompt for input data totalChairs
rows Enter input data
Calculate totalChairs
Display totalChairs


Basic Programming Principles Second Edition Chapter 3 Answers
Page 2 of 12