Programming logic | Computer Science homework help

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()stopclass 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   returnend 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 2013callThree.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. 

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