题解 | #统计成绩#

import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        // 注意 hasNext 和 hasNextLine 的区别
        while (in.hasNextInt()) { // 注意 while 处理多个 case
            int num = in.nextInt();
            Double[] sco0 = new Double[num]; // 动态初始化
            for(int i = 0 ; i < num; i++){
                sco0[i] = in.nextDouble();
            }
            Double max = sco0[0];
            Double min = sco0[0];
            Double sum = sco0[0];
            for(int i = 1; i < sco0.length; i++){
                if(max < sco0[i]){
                    max = sco0[i];
                }
                if(min > sco0[i]){
                    min = sco0[i];
                }
                sum += sco0[i];
            }
            System.out.printf("%.2f %.2f %.2f",max,min,sum/num);
        }
    }
}