Microsoft Word - BCS230_182_homework5.docx
BCS 230: Foundations of Computer Programming II
CRN 90110, 90111 Fall 2018
Instructor: Dr. Jie Li
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Homework 5 − Wednesday, November 14
Due Saturday, December 8, 11:59PM on Blackboard
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Objective: To learn to handle pointer variables and use dynamic a
ays to manipulate data in a class.
Tasks:
In this programming assignment, you will write a program that defines a class called Student whose
objects can have a flexible number of scores. The program prompts the user for the following information:
first name and last name of a student, the maximum number of scores, and the actual scores of a student.
For example, a student may have a maximum of 10 scores but actually input 5 scores. After all the scores
are entered, the program calculates the student average score. The program should output student’s
information including a student’s first name and last name, the actual number of scores, a list of all the
scores, and the average score. A sample output (partial) is shown in Figure 1.
Your program should define a class Student and implement it as required. The class Student should
have the following private member variables.
Member Variable Description
1 firstName A string variable that holds a student’s first name.
2 lastName A string variable that holds a student’s last name.
3 maxSize An int variable that represents the maximum number of scores.
4 size An int variable that represents the actual number of scores entered for
a student.
5 scores A pointer variable of type int that stores the address of an int
dynamic a
ay. The dynamic a
ay is to store the student scores.
The class Student should also have the following public member functions.
Member Function Description
1 A constructor with
default parameters
This constructor has three formal parameters and use them to initialize
firstName, lastName, and maxSize member variables. The
default values are empty string for firstName and lastName, and
10 for maxSize.
The value for maxSize should be positive, otherwise use 10 instead.
The constructor also initializes size to 0 and creates a dynamic a
ay
of size maxSize whose address is stored in the pointer variable
scores.
2 setFName Accepts a string argument and copies it into the firstName member
variable.
3 setLName Accepts a string argument and copies it into the lastName member
variable.
4 getFName Returns the value in firstName.
5 getLName Returns the value in lastName.
6 getNumScores Returns the actual number of scores, i.e., the value of size.
7 appendScore Accepts a score and appends it to the end of the cu
ent list of scores if
the cu
ent number of scores is less than the maximum number of
scores, otherwise outputs an e
or message “Exceeds the maximum
number of scores”.
8 getAverage Calculates and returns the average score.
9 printStudent Outputs a student’s first name and last name, the actual number of
scores, a list of all the scores, and the average score (with 2 decimal
places).
10 A destructor To destroy the dynamic a
ay.
11 A copy constructor A constructor that creates a new Student object using another
Student object.
12 Overloaded assignment
operator =
Overloads the assignment operator = to assign one Student object to a
Student variable.
The main function should contain statements to test class member functions including the constructor
with default values, copy constructor, overloaded assignment operator, appendScore,
printStudent, and other member functions.
Data validation and e
or handling is required. A valid score is between 0 and 100. Display an e
or
message if a score is invalid and allow the user to reenter a score or quit when the user enters a value of -1.
The actual number of scores should be no more than the maximum number of scores. Display an e
or
message “Exceeds the maximum number of scores” if the user tries to enter a score that exceeds the
maximum number of scores.
Submission:
You should submit a ZIP file that contains three files on the following names (case-sensitive):
the header file Student.h,
the class implementation file Student.cpp
the test program hw5main.cpp.
Do NOT use any other file names.
Be sure to include the integrity statement “I certify that this submission is my own original work” with
your name and RAM ID in each source file.
Extra credit:
Write two extra member functions:
setScores: Accepts two arguments, an int a
ay (storing scores) and an integer (storing the number of
the scores in the a
ay) and copies the scores into the dynamic a
ay member variable. If the number of
scores in the argument exceeds the maximum number of scores, only copy the scores up to the maximum
number of scores.
getScores: Returns a student’s scores using a pointer variable.
In the main function, add statements to test these two member functions.
Figure 1. Sample Output
If a user enters an invalid score, the program displays an e
or message “The score is invalid”.
If more score than the maximum number of scores is entered, the program displays an e
or
message “Exceeds the maximum number of scores” and quits data input.
User enters less scores than the maximum number of scores