Question

求JAVA源代码

1、编写一个java成绩统计程序，输入一个班的java成绩（含姓名和分数），统计出平均分，最高分、最低分，并打印成绩单。由于编程时人数不确定，所以要求使用Vector或ArrayList完成上述程序。
1）学生成绩用一个类Mark表示，其成员变量包含考生姓名、成绩。输入的姓名为"end"时，程序结束。
2）主类的名称叫做GradeStatistic，将Mark设计为GradeStatistic的内部类。

提示：键盘输入采用Scanner类，实例化Scanner采用下述语句：

Scanner sc=new Scanner(System.in);

然后通过sc调用Scanner的各种方法输入相应的数据。

Answer 1

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class GradeStatistic {

public static void main(String[] args) {

GradeStatistic gs = new GradeStatistic();

List<Mark> list = new ArrayList<Mark>();

float sum = 0;

while(true){

Scanner sc = new Scanner(System.in);

System.out.print("Please input student name: ");
String name = sc.nextLine();

if(name.equals("end")){
break;
}

System.out.print("Please input student score: ");
float score = sc.nextFloat();
sum += score;

list.add(gs.new Mark(name, score));

}

float max = list.get(0).getScore();
float min = list.get(0).getScore();

for(Mark mark: list){
if(max < mark.getScore()){
max = mark.getScore();
}

if(min > mark.getScore()){
min = mark.getScore();
}

}

float average = sum / list.size();

System.out.println("Average is: " + average);
System.out.println("Max is: " + max);
System.out.println("Min is: " + min);
}

private class Mark{
private String name;
private float score;

public Mark(String name, float score){
this.name = name;
this.score = score;
}
public String getName() {
return name;
}
public float getScore() {
return score;
}
}
}
----------------------
Please input student name: Zhang san
Please input student score: 100
Please input student name: Li Si
Please input student score: 91
Please input student name: Ec
Please input student score: 35
Please input student name: ma qi
Please input student score: 67
Please input student name: end
Average is: 73.25
Max is: 100.0
Min is: 35.0

Answer 2

师傅你太不厚道了