public class SGS {
	public static void main(String[] args){
		CourseCatalog courseCatalog = new CourseCatalog();
		Teacher teacher = new Teacher("t0001","tom");
		Course c = new Course("c0001", "Java", 6, 2011, 2, teacher);
		c.addStudent(new Student("s0001","john"));
		c.addStudent(new Student("s0002","bill"));
		courseCatalog.addCourse(c);	
		
		Course cc = courseCatalog.findCourse("c0001");
		cc.setScore(new Score("s0001",cc.getCourseNo(),90));
		cc.setScore(new Score("s0002",cc.getCourseNo(),70));
		cc.display();
	}
}