Description

This lab is based on the material studied in week 2 and 3, including the exercises done in class.

This assignment is to be done individually; you are not allowed to work on this assignment with anyone.

See also the Academic Integrity Policy and the Assignment and Exam Policies

Question 1

You are to write a program that allows the user to calculate the cost of a set of items in inventory. The user will

enter the item name, the cost of the item, and the quantity of the item on hand. After entering these values, the

user will then be able to see a summary of the total value of that item.

Sample program interaction (prompts in black, user input in blue) with output at the end in green. These colours

are here for demonstration only; your program does not need to display in colour):

Enter product name: McDonalds Happy Meal

Enter product cost: 19.95

Enter quantity on hand: 3

Total value of Happy Meal: $59.85

The final total displayed in the output must be formatted with a dollar sign and exactly two digits after

the decimal.

Your program must use variables of the appropriate type.

All input and output must be done on the console (e.g. using Scanner for input and

println()/printf()/print() for output.

Question 2

A Mad-Lib is a game where the user is prompted to enter various values, and those values are used to make up a

story or poem. You can view a web-based example here (this was written with HTML and PHP).

Make up your own Mad-Lib in Java. Prompt the user for the values you want them to enter (your Mad-Lib must

have a minimum of 4 user-entered values) using console input (i.e. Scanner class). These inputs should be stored

in variables. Display the final Mad-Lib on the console.

Sample program interaction (prompts in black, user input in blue) with output at the end in green:

Enter each of the following things:

An animal: cat A colour: purple

Something purple: a bruised toe

A verb (imperative): code

Your Mad-Lib:

----------- Mary had a little cat;

It's fleece as purple as a bruised toe,

And everywhere that Mary went, The cat was sure to code.

Question 3

You are to write a program that calculates the slope and midpoint of a line PQ, the coordinates of which will be

input by the user.

A point consists of an x-value and a y-value, and you have two points, so you'll need to prompt the user to enter

the x-value and y-value for point P and the x-value and y-value for point Q. You'll need to store these input

values inside variables that are declared with appropriate identifiers and data types. Your prompts to the user

should be clear, concise, and use proper spelling/grammar.

Once the user enters coordinates for the two points, it will then calculate the slope of the line connected by PQ,

and the mid point of the line connected by PQ.

Your program should display the two points P and Q before it displays the slope and the mid-point.

Below is an example that shows the format of your program's interaction with the user and its output (black text

is used for the prompts created by the program; blue text is used for the user's inputs; green text is the program's

actual outputs.

Recording Point P: Enter X-Value: 2.0

Enter Y-Value: 1.0

Recording Point Q:

Enter X-Value: 5.5 Enter Y-Value: 7.5

A Line connected by P(2.0, 1.0) and Q(5.5, 7.5)

- Has a slope of 1.86 - Has a mid-point of (3.8, 4.3)

Your output and must appear exactly as shown above:

The points P and Q must be displayed exactly as above, including spacing.

The coordinates of the points P and Q must be formatted to one decimal place.

The slope of the line PQ must be displayed exactly as above, including String literals and spacing.

The slope of line PQ must be formatted to two decimal places.

The mid-point of the line PQ must be displayed exactly as above, including String literals and spacing.

The coordinates of the mid-point of line PQ must be formatted to one decimal place.

Note that this is a console program (no dialogs/GUI).

Your program must use variables of the appropriate type and with self-documenting names.

You must include appropriate documentation in your code.

Useful Formulae

The slope of the line is calculated for a line AB with two points A(x1, y1) and B(x2, y2) as:

2 1

2 1

The mid-point of a line AB with two points A(x1, y1) and B(x2, y2) is:

1 + 2

2 ,

1 + 2

2

Submission

All submissions are expected to abide by the Submission Standards and all code is expected to abide by the

Coding Standards for this Course. Before the deadline specified on Slate.

You are to submit 3 files for each questions:

Your Java source code for your program.

A text or word processed document containing all of your source code.

Screenshot a screenshot of your code & console display (.jpg file)

1. Source Code File:

Submit only the source code file (.java) for your program. DO NOT submit anything else or you will

lose marks. DO NOT submit .class files, DO NOT submit your editor's backup files (e.g. .java~

or .bak), etc.

DO NOT compress your files by using ZIP or RAR

The name of your file should be YourfirstnameYourlastnameAssignment#Q#.java, For example,

JohnSmithAssignment1Q1.java.

2. Document of Source:

You must also copy and paste all of your source code into a plain text file (e.g. .TXT), or Word document

(e.g. .DOC/.DOCX). Submit this document in addition to your source code java file. This is used for SLATE's

originality checker.

Submit your assignment to where you download this instruction in SLATE, that is

Slate/Assessment/Assignment/Assignment 1, click [add a file].

IMPORTANT: Failure to follow any of the instructions above will result in penalties or a grade of 0.

Evaluation

Your submission will be evaluated based on the following criteria:

Efficient Code: Program uses variables where and only when necessary; program doesn't define

variables that are never used, nor does it use too many variables for unnecessary tasks; program logic is

written concisely and is not cluttered with unnecessary tasks.

Functionality: program functions according to specifications - input and output is done on the console

using the techniques discussed in class; variables are used to store user inputs until they are needed for

output.

Programming Style: proper indentation and spacing, use of comments/documentation; all identifiers are

descriptive and valid; varibles are defined with appropriate types and converted when required.

Other: all instructions regarding submissions and program specifications have been followed;

submission was completed and submitted as requested in a timely fashion; techniques discussed in class

have been use