1 interface Achievement {
2 public abstract float average();
3 }
4 class Person {
5 String name;
6 int age;
7 public Person(String newName,int newAge) {
8 name=newName;
9 age=newAge;
10 }
11 public void introduce() {
12 System.out.println("你好,我是"+name+",今年"+age+"岁");
13 }
14 }
15 class Student extends Person implements Achievement {
16 int chinese,math,english;
17 public Student(String newName,int newAge) {
18 super(newName,newAge);
19 }
20 public void setScore(int c,int m,int e) {
21 chinese=c;
22 math=m;
23 english=e;
24 }
25 public float average() {
26 return (chinese+math+english)/3;
27 }
28 }
29 class C3_2 {
30 public static void main(String[] args) {
31 Student s1=new Student("张三",16);
32 s1.introduce();
33 s1.setScore(80,90,80);
34 System.out.println("平均分: "+s1.average());
35 }
36 }
补上周六欠的。
Original: https://www.cnblogs.com/ljydbk/p/14128050.html
Author: 李家宇
Title: 每日代码系列（17）
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