Day 12: Inheritance

sample.java

class Student extends Person{
	private int[] testScores;
    
    Student(String firstName, String lastName, int id, int[] testScores) {
        super(firstName, lastName,id);
        this.testScores = testScores;
    }
    
    public String calculate() {
      double avarage = java.util.stream.IntStream.of(testScores)
                .average()
                .getAsDouble();

        return 90 <= avarage && avarage <= 100 ? "O" :
                80 <= avarage && avarage < 90 ? "E" :
                        70 <= avarage && avarage < 80 ? "A" :
                                55 <= avarage && avarage < 70 ? "P" :
                                        40 <= avarage && avarage < 55 ? "D" :
                                                avarage < 40 ? "T" : "";
    }
}