Question

HW 8-1a  

1.)   Referring to the UML class diagram, create a program that utilizes the Student class.

- id : Integer

- units : Integer

- name : String

+ Student ( ) :

+ Student (id : Int, name : String, units : Int) :

+ ~Student( ) :

+ setID(id : Integer) : void

+ setName(name: String) : void

+ setUnits(units : Integer ) : void

+ displayRecord() : void

2.)   Include 3 files:

-   Source.cpp

-   Student.h

-   Student.cpp

3.)   In main(), declare two objects of Student type, named s1 and s2.

• The s1 object calls the default constructor.
  • For s1, the object should be instantiated (initialized) with these values:
    • ID: 0
    • Name: (empty string)
    • Units: 0
• The s2 object calls the overloaded constructor.
  • For s2, the object should be instantiated (initialized) with these values:
    • ID: 100
    • Name: Tom P. Lee
    • Units: 12

4.)   In main(), the s1 object calls its displayRecord() function. Here is the output:

           ID:        0

          Name:

           Units:     0

5.)   Then in main(), the s2 object calls its displayRecord() function. Here is the output:

           ID:        100

           Name: Tom P. Lee

           Units:     12

6.)   Then in main(), use the set functions to set to assign these values to the s1 object:

           ID:        101

           Name: John Lee Hooker

           Units:     15   

7.)    Finally, the s1 object calls its displayRecord() function again. Here is the output:

           ID:        100

           Name: John Lee Hooker

           Units:     15

/* OUTPUT

Here is student #1:

   ID:     0

   Name:  

   Units: 0

Here is student #2:

   ID:     100

   Name:   Tom P. Lee

   Units: 12

Here is student #1 after the set functions:

   ID:     100

   Name:   John Lee Hooker

   Units: 15

1) Referring to the following UML class diagram, create a program that utilizes three class specifications:

Student, UnderGrad, and Grad

- Include these 7 files in your project:

- main.cpp

- Student.h

- Student. cpp

- UnderGrad.h

- UnderGrad.cpp

- Grad.h

- Grad.cpp

2.)   In main(), declare two objects of UnderGrad and Grad type, respectively, as show below:

int main()

{

           UnderGrad underGrad(100, 9, "Tom Lee", "Freshman");

           Grad grad(101, 12, "Jim Jones", "PHD");

3.)   In main(), the object, underGrad, calls its displayRecord() function. Here is the output:

           ID:        100

           Name: Tom Lee

           Units:     9

           Class:     Freshman

4.)   In main(), the object, grad, calls its displayRecord() function. Here is the output

             of the function:

           ID:        101

           Name: Jim Jones

           Units:     12

           Degree:    PHD

5.)   Then, in main(), the object, grad, calls its setUnits() function, and changes the number of units

from 12 to 15.

6.)   Finally, in main(),the object, grad, calls its displayRecord() function. Here is the output

             of the function:

           ID:        101

           Name: Jim Jones

           Units:     15              ß (Units has changed to 15)

          Degree:    PHD

Please make a code on C++ language, and please add comments for each codes.

Answer 1

1.

// Student.h
#ifndef STUDENT_H
#define STUDENT_H

#include <string>
using namespace std;

class Student
{
private:
int id;
int units;
string name;
public:
Student();
Student(int id, string name, int units);
~Student();
void setID(int id);
void setName(string name);
void setUnits(int units);
void displayRecord();
};

#endif

//end of Student.h

// Student.cpp

#include "Student.h"
#include <iostream>

// default constuctor to initialize the fields to default values
Student::Student() : id(0), units(0), name("")
{}

// parameterized constuctor to initialize the fields to specified values
Student::Student(int id, string name, int units) : id(id), units(units), name(name)
{}

// destructor to destroy the Student object
Student::~Student()
{}

// function to set the id
void Student::setID(int id)
{
this->id = id;
}

// function to set the name
void Student::setName(string name)
{
this->name = name;
}

// function to set the units
void Student::setUnits(int units)
{
this->units = units;
}

// function to display student information
void Student::displayRecord()
{
cout<<"ID: "<<id<<endl;
cout<<"Name: "<<name<<endl;
cout<<"Units: "<<units<<endl;
}

//end of Student.cpp

// main.cpp
#include "Student.h"
#include <iostream>
using namespace std;

int main()
{
Student s1;
cout<<"Here is student #1:"<<endl;
s1.displayRecord();

Student s2(100, "Tom P. Lee",12);
cout<<"Here is student #2:"<<endl;
s2.displayRecord();
cout<<"Here is student #1 after the set functions:"<<endl;
s1.setID(101);
s1.setName("John Lee Hooker");
s1.setUnits(15);
s1.displayRecord();
return 0;
}

//end of main.cpp

Output: