COS1512 Assignment 3 (COMPLETE ANSWERS) 2024 (160814) - DUE 23 August 2024

COS1512

Assignment 3

(COMPLETE

ANSWERS) 2024

(160814) - DUE 23

August 2024

,COS1512 Assignment 3 (COMPLETE ANSWERS) 2024 (160814) - DUE 23

August 2024

Question 1 Consider the following structure used to keep record of a student’s

scores: struct Student { string name; int quiz1; int quiz2; int midtermExam; int

finalExam; } A student is assessed according to the following policies: 1. The

two quizzes are each marked out of 10. 2. The midterm exam and the final

exam are each marked out of 100 marks. 3. The final exam counts for 50% of

the grade, the midterm counts for 25%, and the two quizzes together count for

a total of 25%. (Do not forget to normalize the quiz scores. They should be

converted to a percentage before they are averaged in.) Turn the student

record into a class type rather than a structure type. The student record class

should have member variables for all the input data. Make all member

variables private. Include public member functions for each of the following: •

a default constructor that sets the student ‘s name to a blank string, and all the

scores to 0; • member functions to set each of the member variables to a

value given as an argument to the function (i.e. mutators); • member functions

to retrieve the data from each of the member variables (i.e. accessors); • and

a function that calculates and returns the student’s weighted average numeric

score for the entire course. Use this class in program which grades a student.

The program should read in the student’s name and scores and output the

student’s record as well as the student’s average numeric score for the entire


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, course. Use the keyboard to supply input and display the output on the

screen. Test your program with the following input: Student name: Johnny

Applemac Quiz 1: 7 Quiz 2: 5 Midterm exam: 65 Final exam: 73 Downloaded

by Corona Virus () lOMoARcPSD| COS1512/103/2024 3 Question 2 – a bit of

theory and terminology (a) What is the purpose of the keywords public and

private in the class declaration? (b) What is the difference between a class

and an object? (c) What does it mean to “instantiate” an object? (d) What is

the purpose of a constructor? (e) What is the difference between the default

constructor and the overloaded constructor? (f) What is the purpose of a

destructor? (g) What is the purpose of an accessor? (h) What is the purpose

of a mutator? (i) What is the purpose of the scope resolution operator? (j)

What is the difference between the scope resolution operator and the dot

operator? (k) What is the difference between a member function and an

ordinary function? (l) What is an abstract data type (ADT)? (m) How do we

create an ADT? (n) What are the advantages of using ADTs? (o) What is

separate compilation? (p) What are the advantages of separate compilation?

(q) What is a derived class? (r) What is the purpose of inheritance?

Downloaded by Corona Virus () lOMoARcPSD| COS1512/103/2024 4

Question 3 Consider the following class declaration: class PersonType {

public: PersonType(); PersonType(string n, int id, string bd); private: string

name; int ID; string birthday; }; Explain what is wrong with the following code


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