Question

Assignment W3-2

This programming assignment addresses:

•Compiling and Executing an App with more than 1 class

•Initializing Objects using Constructors

•Software Engineering with Private Instances Variables and Public Set/Get Methods

•Uses Methods inside classes

Description: You are asked to write a program to process two students’ scores. Each student will have scores for 3 tests, the user will input each student’s full name followed by their three scores. When the data for the two students are read from the keyboard, your program should output the following reports:

•For each student, you should output their highest as well as the average score.

•You should output the full name of the student who has the highest average score.

•Your program should output the name(s) of the students who qualify for the assistant ship.

For a student to qualify for an assistantship, they must have at least one grade of A (that is a score in the range of 90-100.

Important note: if there is no qualifying student, your report simply does not mention any names.

The following is the requirements of this program:

•Declare a class called Student whose attributes should be their full name and 3 scores(Do not use an array).

•Define a constructor for class Student that will be used to initialize their full name and the three scores (all int), should not accept parameters, which means you have to specify null initial values to all attributes.

•You MUST have the following methods as part of your Student class:

All the proper set and get methods.

A method that computes the average of the three scores.

A method that computes the highest of the three scores.

A method that outputs a proper message only if the student is qualified for the assistantship.

•Two files:Class Student (Student.java) and Main program to test the class(Main.java)

Answer 1

Student.java

//declare Student class
class Student
{
//instance variables
String fullName;
int score1,score2,score3;
//constructor
public Student()
{
    fullName=null;
    score1=0;
    score2=0;
    score3=0;
}
//set & get methods for instance variables
public void setFullName(String fullName)
{
    this.fullName=fullName;
}
public String getFullName()
{
    return this.fullName;
}
public void setScore1(int score1)
{
    this.score1=score1;
}
public int getScore1()
{
    return this.score1;
}
public void setScore2(int score2)
{
    this.score2=score2;
}
public int getScore2()
{
    return this.score2;
}
public void setScore3(int score3)
{
    this.score3=score3;
}
public int getScore3()
{
    return this.score3;
}
//compute average score
public double averageScore()
{
    return (score1+score2+score3)/3.0;
}
//maximum score
public int maximumScore()
{
    if(score1>score2 && score1>score3)
    return score1;
    else if(score2>score3)
    return score2;
    else
    return score3;
}
//check qualified for assistantship or not
boolean checkQualifiedForAssistantship()
{
     if((score1>=90 && score1<=100) || (score2>=90 && score2<=100) || (score3>=90 && score3<=100))
     return true;
     else
     return false;
}
}

Main.java

import java.util.Scanner; //reads data from inputstream
class Main
{
public static void main(String[] args)
{
     //declare Scanner object
     Scanner input=new Scanner(System.in);
     //declare two Student objects
     Student student1=new Student();
     Student student2=new Student();
     System.out.println("Enter Student1 details");
     System.out.println("Enter full name");
     student1.setFullName(input.nextLine());
     System.out.println("Enter score1");
     student1.setScore1(input.nextInt());
     System.out.println("Enter score2");
     student1.setScore2(input.nextInt());
     System.out.println("Enter score3");
     student1.setScore3(input.nextInt());
     input.nextLine();
     System.out.println("Enter Student2 details");
     System.out.println("Enter full name");
     student2.setFullName(input.nextLine());
     System.out.println("Enter score1");
     student2.setScore1(input.nextInt());
     System.out.println("Enter score2");
     student2.setScore2(input.nextInt());
     System.out.println("Enter score3");
     student2.setScore3(input.nextInt());
     if(student1.checkQualifiedForAssistantship()==true)
     {
        System.out.println("Student1 qualified for Assistantship");
        System.out.println("Full Name "+student1.getFullName());
        System.out.println("Score1 "+student1.getScore1());
        System.out.println("Score2 "+student1.getScore2());
        System.out.println("Score3 "+student1.getScore3());
        System.out.println("Average Score "+student1.averageScore());
        System.out.println("Maximum Score "+student1.maximumScore());
     }
     else
     System.out.println("Student1 not qualified for Assistantship");
     if(student2.checkQualifiedForAssistantship()==true)
     {
        System.out.println("Student2 qualified for Assistantship");
        System.out.println("Full Name "+student2.getFullName());
        System.out.println("Score1 "+student2.getScore1());
        System.out.println("Score2 "+student2.getScore2());
        System.out.println("Score3 "+student2.getScore3());
        System.out.println("Average Score "+student2.averageScore());
        System.out.println("Maximum Score "+student2.maximumScore());
     }
     else
     System.out.println("Student1 not qualified for Assistantship");
}
}

Output