Programming logic | Computer Science homework help

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1. Find the bugs(5bugs)

 

// A Patient class is used by a doctor’s office.

// The Patient class has two overloaded constructors:

//    1) a default constructor,

//    2) one that requires an ID number, first and last name.

// A demonstration program declares two Patient objects

// and displays each patient’s data fields.

start

   Declarations

      Patient patient1()

      Patient patient2(“234”, “Lee”, “Lydia”)

   patient1.display()

   patient2.display()

stop

class Patient

   Declarations

      private string idNum

      private string lastName

      private string firstName

   public Patient()

      idNum = “0000”

      lastName = “XXXX”

      firstName = “XXXX”

   return

   public Patient(string id, string last, string first)

      idNum = idNum

      last = last

      firstName = first

   return

 public void display()

      output “Patient #”, id, lastName, firstName

   return

end

 

2. 2a and 2b were shown or done in class. 2c & 2d are for your homework 

 

a. Design a class named PhoneCall with four fields: two strings that hold the 10-digit phone 

numbers that originated and received the call, and two numeric fields that hold the length of the 

call in minutes and the cost of the call. Include a constructor that sets the phone numbers to Xs 

and the numeric fields to 0. Include get and set methods for the phone numbers and call length 

fields and a get method for the cost, but do not include a set method for the cost field. When 

the call length is set, calculate the cost of the call at three cents per minute for the first 10 

minutes, and two cents per subsequent minute. Create the class diagram and write the 

pseudocode that defines the class. 

 

Answer: A sample solution follows 

 

 Diagram: 

 

PhoneCall 

-origCall: string 

-recCall: string 

-length: num 

-cost: num 

+PhoneCall() 

+setOrigCall(number : string) : void 

+setRecCall(number : string) : void 

+setLength(len : num) : void 

+getOrigCall() : string 

+getRecCall() : string 

+getLength() : num 

+getCost() : num 

 

 

Pseudocode: 

 

class PhoneCall 

Declarations 

private string origCall 

private string recCall 

private num length 

private num cost 

 

public PhoneCall() 

 origCall = “XXXXXXXXXX” 

 recCall = “XXXXXXXXXX” 

 length = 0 

 cost = 0 

return 

 

public void setOrigCall(string number) 

 origCall = number 

return 

 

public void setRecCall(string number) 

 recall = number 

return 

 

public void setLength(num len) 

 Declarations 

 num LIMIT = 10 

 num LIMIT_OR_LESS = .03 

 num MORE_THAN_LIMIT = .02 

 length = len 

 if length > LIMIT then 

 cost = (LIMIT_OR_LESS * LIMIT) + 

 (MORE_THAN_LIMIT * (length – LIMIT)) 

 else 

 cost = LIMIT_OR_LESS * length 

 endif 

return 

 

 

public string getOrigCall() 

return origCall 

 

public string getRecCall() 

return recCall 

 

public num getLength() 

return length 

 

public num getCost() 

return cost 

endClass 

 

b. Design an application that declares three PhoneCalls. Set the length of one PhoneCall 

to 10 minutes, another to 11 minutes, and allow the third object to use the default value 

supplied by the constructor. Then, display each PhoneCall’s values. 

 

Answer: A sample solution follows 

 

Pseudocode: 

 

start 

 Declarations 

PhoneCall callOne 

 PhoneCall callTwo 

 PhoneCall callThree 

 

 callOne.setLength(10) 

 callTwo.setLength(11) 

 

 output “PhoneCall 1 info:” 

 output “Originating number = ”, callOne.getOrigCall() 

 output “Receiving number = ”, callOne.getRecCall() 

 output “Call length = ”, callOne.getLength() 

 output “Call cost = ”, callOne.getCost() 

 

 output “PhoneCall 2 info:” 

 output “Originating number = ”, callTwo.getOrigCall() 

 output “Receiving number = ”, callTwo.getRecCall() 

 output “Call length = ”, callTwo.getLength() 

 output “Call cost = ”, callTwo.getCost() 

 

 output “PhoneCall 3 info:” 

 output “Originating number = ”, Chapter 11 – Part 2, Exam Question #2 – Fall 2013

callThree.getOrigCall() 

 output “Receiving number = ”, callThree.getRecCall() 

 output “Call length = ”, callThree.getLength() 

 output “Call cost = ”, callThree.getCost() 

 

stop 

 

 

Here is your assignment using the above 2a and 2b as the starting point/basis: 

 

c. Create a child class named InternationalPhoneCall. Override the parent class 

method that sets the call length to calculate the cost of the call at 40 cents per minute. 

Create the Class Diagram for the child class and write the pseudocode for the child 

class. 

 

d. Create the logic for an application that instantiates a PhoneCall object and an 

 

InternationalPhoneCall object and displays the costs for both. 

The post Programming logic | Computer Science homework help appeared first on oneacademyessays.

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