public class  Stu2  implements  Student_info, Student_scoure 
{                                //實現學生情況接口、學生成績接口
    String name;                             
    int birth_year;
    float math,english,computer;
    public Stu2(String n1,int y,float a,float b,float c)
    {
        name = n1;
        birth_year = y;
        math = a;
        english = b;
        computer = c;
    }
    public int age()
    {
        return year - birth_year;
    }
    public float total()
    {
        return math + english + computer;
    }
    public void  output()                       //實現接口的方法
    {
        System.out.print(this.name +"  "+ this.age()+"歲  ");
        System.out.println(math +"  "+ english +"  "+ computer +"  "+ total());
    }
    public static void main (String args[])
    {
        Stu2 s2 = new Stu2("李明",1980,90,80,70);
        s2.output();
    }
}