[snoopy]

interface Data {
	public void showData();
}

abstract class Test {
	abstract public void showScore();

	abstract public double calcu();
}

class CStu extends Test implements Data {
	protected String id; // 學號 

	protected String name; // 姓名  

	protected int mid; // 期中考成績 

	protected int finl; // 期末考成績 

	protected int common; // 平時成績 

	public CStu(String s1, String s2, int m, int f, int c) {
		id = s1;
		name = s2;
		mid = m;
		finl = f;
		common = c;
	}

	public void show() {
		showData();
		showScore();
	}

	public void showScore() {
		System.out.println("期中考成績:" + mid);
		System.out.println("期末考成績:" + finl);
		System.out.println("平時成績:" + common);
		System.out.println("學期成績:" + calcu());
	}

	public void showData() {
		System.out.println("學號:" + id);
		System.out.println("姓名:" + name);
	}

	public double calcu() {
		return (mid * 0.3 + finl * 0.3 + common * 0.4);
	}
}

public class App {
	public static void main(String args[]) {
		CStu stu = new CStu("940001", "Fiona", 90, 92, 85);
		stu.show();
	}
}