Inheritance.java

package hackerrank;


import java.util.*;

class Person {
	protected String firstName;
	protected String lastName;
	protected int idNumber;
	
	// Constructor
	Person(String firstName, String lastName, int identification){
		this.firstName = firstName;
		this.lastName = lastName;
		this.idNumber = identification;
	}
	
	// Print person data
	public void printPerson(){
		 System.out.println(
				"Name: " + lastName + ", " + firstName 
			+ 	"\nID: " + idNumber); 
	}
	 
}

class Student extends Person{
	private int[] testScores; int a ;



    /*	
    *   Class Constructor
    *   
    *   @param firstName - A string denoting the Person's first name.
    *   @param lastName - A string denoting the Person's last name.
    *   @param id - An integer denoting the Person's ID number.
    *   @param scores - An array of integers denoting the Person's test scores.
    */
    // Write your constructor here
   /* Student(String firstName,String lastName,int ID,int[] scores);
    {
        super(Person);
        this.id = ID;
        this.scores = scores;
    } */
	public Student(String firstName, String lastName, int id, int[] testScores){
	    super(firstName,lastName,id);
	    this.testScores=testScores;
	    this.firstName=firstName;
	    this.lastName=lastName;
	    this.idNumber=id;
	}
    /*	
    *   Method Name: calculate
    *   @return A character denoting the grade.
    */
    // Write your method here

public char calculate(){ 
    for(int i=0;i<testScores.length;i++){
        a=a+testScores[i+3];
    }
    a=a/testScores.length;
    if(90<=a&&a<=100){
        return 'O';
    }else if(80<=a&&a<90){
        return 'E';
    }else if(70<=a&&a<80){
        return 'A';
    }else if(55<=a&&a<70){
        return 'P';
    }else if(40<=a&&a<55){
        return 'D';
    }else if(0<=a&&a<40){
        return 'T';
    }
    else
    return Character.MIN_VALUE;
}
}
/*  int avg=0;
          for(int i=0;i<testScores.length;i++)
              avg+=testScores[i];
           avg=avg/testScores.length;
          return(avg> 89 ?'O': avg>79 ? 'E' : avg > 69 ? 'A' : avg > 54 ? 'P' :avg > 39 ? 'D' : 'T' );
      }
}*/

public class Inheritance  {
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		String firstName = scan.next();
		String lastName = scan.next();
		int id = scan.nextInt();
		int numScores = scan.nextInt();
		int[] testScores = new int[numScores];
		for(int i = 0; i < numScores; i++){
			testScores[i] = scan.nextInt();
		}
		scan.close();
		
		Student s = new Student(firstName, lastName, id, testScores);
		s.printPerson();
		System.out.println("Grade: " + s.calculate() );
	}
}