Lab Assignment $3$

COSC$-1436$ Programming Fundamentals I Java

Purpose

Java looping and format output implementations

Program Specifications:

You are to design a math tutoring program that can be used as a math tutor for a young

student. This program will display a menu allowing user to select an addition, a subtraction,

or a multiplication problem. The last selection on the menu should let user exit the program.

The menu looks like the following:

Math Tutoring Game

$1.$ Addition

$2.$ Subtraction

$3.$ Multiplication

$4.$ Exit the Game

Here are the steps to play the game:

$1.$ The program will prompt the user to enter a selection

$2.$ The program then displays two random numbers between $10$ and $50$ that are to be

either added, subtracted, or multiplied such as:

$36$

$+27$

$-------$

$3.$ The program should wait for the user to enter the answer. If the answer is correct, a

message of congratulation should be printed. If the answer is incorrect, a message

should be printed showing correct answer.

$4.$ After user has finished the math problem, the program should display the menu

again. This process is repeated until the user selects the choice $(4)$ to exit the

program.

$5.$ Input Validation: If the user selects an item not on the menu, display an error

message and display the menu again.

To Solve this problem, we can identify IPO and develop the Pseudocode.

Input Menu selection

User answer

Processing $$ Use random number to generate $2$ numbers between $10$ and $50$

$($inclusive$)$

$$ Generate math problem from $2$ random numbers and user selected

operation

$$ Prompt for user answer and check user answer for correctness

$$ Repeat the process until user select $(4)$ exit the program

Output Display message about user$$s answer

Variables menuSelection, firstNum, secondNum$,$ userAnswer, correctAnswer $$ all

variables are int type

Constants final int MIN $=10,$ MAX $=50$;

$-$ the range of random number

Random num To generate random number, use Math.random$()$ method

To generate number in range $10-50$ inclusive: Use constant MIN and MAX

MIN $+($int$)($Math$.$random$()*($MAX$-$MIN$+1))$

Pseudocode $1.$ Start a looping structure

$2.$ Display menu $($See above menu display$)$

$3.$ Prompt user to enter menu selection: $(1-4)$

$4.$ Validate menu selection

$5.$ Display proper message for invalid selection or Exit the Game selection

$6.$ Generate random numbers between $10-50$ inclusive

$7.$ Display problem $($See above problem display$)$

$8.$ Prompt user to enter answer

$9.$ Check user answer to see if it is correct and display proper message

$10.$ Repeat the same process until user selects $(4)$ to exit the program

Assignment Instructions:

$1.$ Create a Java program to perform the above tasks. Name the file first$\_$last$\_$a$3.$py where

first is your first name, and last is your last name. Create a new Java project in Eclipse or

any Java IDE and name it Assignment$3,$ create a class and name it

first$\_$last$\_$mathTutoring.java where first is your first name and last is your last name.

$2.$ Add comments on top of your program to document your code. Include Program

description, your name and date.

$3.$ Use the above pseudocode to help you write Java code.

$4.$ Name your variables clearly and use constants to store fixed information.

$5.$ Make sure your program is easier to read by adding comments and spaces, etc.

$6.$ Submit your Java class file in Canvas for grading.

$7.$ Your program grade will be based on the following criteria:

a$.$ Program code and output accuracy $70\%$

b$.$ Following program instructions for required identifiers$/$assignment file name if

there are any $15\%$

c$.$ Program documentation $10\%$

d$.$ Program output display $5\%$

$8.$ You will receive a $0$ if you copy others$$ code or let others copy your code. Please refer to

Academy Integrity in course syllabus. Program output is as follows:

Program output: $($Test for each menu item$)$

Math Tutoring Game

$1.$ Addition

$2.$ Subtraction

$3.$ Multiplication

$4.$ Exit the Game

Enter your selection:$1$

$47$

$+22$

$--------$

Enter your answer:$69$

Correct!

Math Tutoring Game

$1.$ Addition

$2.$ Subtraction

$3.$ Multiplication

$4.$ Exit the Game

Enter your selection:$2$

$38$

$-12$

$--------$

Enter your answer:$6$

Incorrect! the correct answer is: $26$

Math Tutoring Game

$1.$ Addition

$2.$ Subtraction

$3.$ Multiplication

$4.$ Exit the Game

Enter your selection:$3$

$19$

x $19$

$--------$

Enter your answer:$189$

ncorrect! the correct answer is: $361$

Math Tutoring Game

$1.$ Addition

$2.$ Subtraction

$3.$ Multiplication

$4.$ Exit the Game

Enter your selection:$5$

Invalid selection

Math Tutoring Game

$1.$ Addition

$2.$ Subtraction

$3.$ Multiplication

$4.$ Exit the Game

Enter your selection:$4$

Goodbye! Come back again!