[20-05-01][Self-test 28]Java Students' Score

 1 package test_6_2;
 2 
 3 public class Student {
 4 
 5     /**
 6      * 编写一个程序，已有若干学生数据，包括学号、姓名、成绩，要求输出这些学生数据并计算平均分。
 7      */
 8     
 9     public static int stuNum;
10     public static double totalScore;
11     
12     public String code;
13     public String name;
14     public double score;
15     
16     public Student() {
17         
18     }
19     
20     public Student(String code, String name, double score) {
21         
22         this.code = code;
23         this.name = name;
24         this.score = score;
25         
26         System.out.println("学号：" + this.code + "，姓名：" + this.name + "，成绩：" + this.score);
27         
28         stuNum++;
29         totalScore += score;
30     }
31     
32     public void avg() {
33         
34         System.out.println("平均分是：" + totalScore / stuNum);
35     }
36     
37 }

 1 package test_6_2;
 2 
 3 public class Test {
 4 
 5     public static void main(String[] args) {
 6 
 7         Student s1 = new Student("01", "Joker", 90);
 8         Student s2 = new Student("02", "Navi", 100);
 9         Student s3 = new Student("03", "Skull", 20);
10         Student s4 = new Student("04", "Violet", 90);
11         
12         s1.avg();
13 
14     }
15 
16 }

结果如下：

学号：01，姓名：Joker，成绩：90.0
学号：02，姓名：Navi，成绩：100.0
学号：03，姓名：Skull，成绩：20.0
学号：04，姓名：Violet，成绩：90.0
平均分是：75.0