[Java] 객체 지향 연습 정답

1. 다음과 같은 실행 결과를 얻도록 Student 클래스에 생성자와 info()를 추가하시오.

public class Ex5_1 {
  public static void main(String[] args) {
    Student s = new Student ("홍길동", 1, 1, 100, 60 , 76);

    String str = s.info();
    System.out.println(str);
  }

}

class Student{
  String name;
  int ban, no, kor, eng, math;
  int sum;
  float aver;

  public Student(String name, int ban, int no, int kor, int eng, int math) {
    this.name = name;
    this.ban = ban;
    this.no = no;
    this.kor = kor;
    this.eng = eng;
    this.math = math;
    this.sum = kor + eng + math;
    this.aver = (Math.round(sum*10/3f))/10f;
  }

  String info(){
    return name + "," + ban + "," + no + "," + kor + "," + eng + "," + math + "," + sum + "," + aver;
  }
}

 

2. getTotal()과 getAverage()를 추가하시오. 

public class Ex5_2 {
  public static void main(String[] args) {
    Student s = new Student();
    s.name = "홍길동";
    s.ban = 1;
    s.no = 1;
    s.kor = 100;
    s.eng = 60;
    s.math = 76;

    System.out.println("이름: " + s.name);
    System.out.println("총점: " + s.getTotal());
    System.out.println("평균: " + s.getAverage());
  }
}

 

class Student{
  String name;
  int ban, no, kor, eng, math;
  int sum;
  float aver;

  public Student(String name, int ban, int no, int kor, int eng, int math) {
    this.name = name;
    this.ban = ban;
    this.no = no;
    this.kor = kor;
    this.eng = eng;
    this.math = math;
    this.sum = kor + eng + math;
    this.aver = (Math.round(sum*10/3f))/10f;
  }

  public Student(){

  }

  String info(){
    return name + "," + ban + "," + no + "," + kor + "," + eng + "," + math + "," + sum + "," + aver;
  }

  int getTotal(){
    return kor + eng + math;
  }

  float getAverage(){
    return (Math.round((kor + eng + math)*10/3f))/10f;
  }
}