CSE $112$ Introduction to Computer Science II

Assignments submitted after the due date will incur a grade penalty of three $(3)$ points per day after

the first day, and will not be accepted more than one $(1)$ week late.

CSE $112$ Lab #$3$ Circle Class $$ Classes and Objects $($page $843-$ #$8)$ with UML Diagram

Create a circle class in a separate header file that has the following private member variables:

$1.$ Radius: a double

$2.$ Pi: a double initialized to $3\mathrm{.}14159$

The class will have the following member functions:

$1.$ Default Constructor that sets the radius to $0\mathrm{.}0($even though the program does not use it$)$

$2.$ A Constructor that accepts the radius of the circle as an argument $($the program will use this$)$

$3.$ setRadius $$ a mutator function for the radius variable

$4.$ getRadius $$ an accessor function for the radius variable

$5.$ getArea $$ returns the area of the circle $($area $=$ pi $*$ radius $*$ radius$)$

$6.$ getDiameter $$ returns the diameter of the circle $($ diameter $=$ radius $*2)$

$7.$ getCircumference $$ returns the circumference of the circle $($circ $=2*$ pi $*$ radius$)$

Requirements:

Using the main function on the next page, write a program that demonstrates the circle class by

prompting the user for the circle$$s radius $($with input validation$),$ create a circle object using the

overloaded constructor, and then report the area, diameter, and circumference with the output

precision set to $(2)$ two decimal places. Use a separate header file for the class. Add a UML Diagram for

the class as a comment below main $(10\%).$

The program will:

$$ Use a separate $*.$h file for the class and a $*.$cpp file for main.

$$ Use $3\mathrm{.}14159$ as the value for pi

$$ Include #ifndef and #endif directives as required

$$ Have a UML diagram of the Class with access specifiers, parameters, and return types $($ref Figure

$13-22$ pg $826)$ as a comment below main.

$//**********************************$

$//$ CLASS NAME

$//**********************************$

$//$ MEMBER VARIABLES

$//$

$//**********************************$

$//$ MEMBER FUNCTIONS

$//($with access specifiers, parameters,

$//$ and return types$)$

$//**********************************$

Grading will be based on meeting all of the lab requirements, adherence to programming standards,

operation and accurate output, and programming style including white space and indentation.

CSE $112$ Introduction to Computer Science II

Assignments submitted after the due date will incur a grade penalty of three $(3)$ points per day after

the first day, and will not be accepted more than one $(1)$ week late.

Sample Main:

$//$ Chapter $13,$ Programming Challenge $8$: Circle Class

int main$()$

$\{$

double radius $=0$; $//$ To hold a radius

$//$ Get the radius.

while $($radius $<=0)$

$\{$

cout $<<$ "Enter the circle's radius: $"$;

cin $>>$ radius;

if$($radius $<=0)$

cout $<<$ "That is not a valid radius." $<<$ endl $<$