import java.util.Arrays;

public class Person{

  private static int count;
  private String name;
  private int age;
  private String[] courses = new String[5];

  public Person(String name, int a){
    this.name = name;
    age = a;
    count++;
    this.count++;
    System.out.println("in ctor1");
  }

  public Person(){
    count++;
    System.out.println("in ctor2");
  }

  public String toString(){
    return name + " " + this.age + " " + Arrays.toString(courses) + " " + count;
  }

  public boolean addCourse(String course){
    boolean success = false;

    for(int i = 0; i < this.courses.length; i++){
      if (courses[i] == null){
        courses[i] = course;
        success = true;
        i = courses.length; // used to get it to quit the loop on next iter
      }
    }

    return success;
  }

  public static void main(String[] args){
    Person john = new Person("John", 22);
    Person jane = new Person();
    Person sam = john;

    System.out.println(john);
    System.out.println(jane);
    System.out.println(sam);

    sam.addCourse("CS1111");
    john.addCourse("GEOG2222");
    jane.addCourse("MATH1221");

    System.out.println(john);
    System.out.println(jane);
    System.out.println(sam);

    sam = new Person();
    sam.addCourse("ART3131");
    john.addCourse("ASTR1233");
    jane.addCourse("PHYS1011");
    System.out.println(john);
    System.out.println(jane);
    System.out.println(sam);

    System.out.println(sam.addCourse("CHEM1111"));
    jane.addCourse("PHYS1012");
    jane.addCourse("PHYS1013");
    System.out.println(jane.addCourse("PHYS1014"));
    System.out.println(jane.addCourse("PHYS1015"));
    System.out.println(john);
    System.out.println(jane);
    System.out.println(sam);
  }

}