walaaalshaikh/hw_week2_day3_inheritance

HW_Week2_Day3_Inheritance

The Home Work has to be delievered before 9AM: ⚠️

Note: You must save all your solution as solution.kt to be submitted before 9AM. ⚠️

Instructions 📋

Part I: Practice with inheritance

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Write a superclass named 'Circle' with with following features:

Properties:

• radius for the circle radius of type double.

Class functions:

• getArea() will return the area of circle (Area formula: Pi * r * r)

Write a subclass named 'Cylinder' will inherit from 'Circle' class with following features:

Properties:

• height for the cylinder hight of type double.

Class functions:

• getVolume() will return the volume of the cylinder. (Volume formula: Pi * r * r * h)
• display() will print cylinder's surface area, and volume.

How it works:

• Ask the user to create either a circle or cylinder.
• Prompt the user to input radius if it is a circle or raduis and height if it is a cylinder.
• Print the result.

Part II: Practice with objects

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Create an object named 'Auth' with with following features:

Object functions:

• validate() will take username and password as string parameters and validate with "hamza" and "1234".If it is valid, print "Authorized" otherwise it will "Not Authorized"

How it works:

• Ask the user to enter name and password.
• Validate the inputs.
• Print the result.

Part III: Bonus Challenge

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Create an superclass named 'Person' with following features:

Properties:

• name : String.
• id : Int.
• email: String.

Constructor:

• init: will sets the name and email to an empty string and sets the id to zero.

Class functions:

• validateEmail(em:String): Verifies that the passed email address contains one @ character and at least one period after the @ character. If the passed email is valid, copy the passed parameter to the object's email member variable and return true, false otherwise.
• inputPerson(): Prompts the user for the name, id, and email address.
• printPerson(): Prints the name, id, and email.

Create an subclass named 'Student' inherits from the Person class with following features:

Properties:

• major : String.
• gpa : Float.

Constructor:

• init: Sets major to an empty string and sets gpa to zero. Invokes the parent constructor to initialize name, id, and email.

Class functions:

• inputPerson(): Calls the parent version of inputPerson to read in the name, id, and email address. Then prompt for the major and gpa.
• printPerson(): Calls the parent version of printPeron to print the name, id, and email address. Then print the student's major and gpa up to two decimal points.

How it works:

• Ask the user to create either a Person or Student.
• Prompt the user to input information.
• Print the result.

Learning Resources 📚

• Classes in Kotlin
• Inheritance in Kotlin
• objects in Kotlin