学生成绩结果如下

import java.util.Scanner;

public class SchoolReport {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("请输入本班学生总数：");
int studentcout = sc.nextInt();
int achivement[][] = new int[studentcout][4];
for (int i = 0; i < studentcout; i++) {
System.out.println("请输入第" + (i + 1) + "个学生的编号：");
achivement[i][0] = sc.nextInt();
System.out.println("请输入语文成绩：");
achivement[i][1] = sc.nextInt();
System.out.println("请输入数学成绩：");
achivement[i][2] = sc.nextInt();
System.out.println("请输入英语成绩：");
achivement[i][3] = sc.nextInt();
}
System.out.println("学生成绩结果如下");
System.out.println("---------------------------------------------");
System.out.println("学生编号\t语文成绩\t数学成绩\t英语成绩\t平均成绩\t总成绩");

    for (int i = 0; i < achivement.length; i++) {
        double sum = 0; //总成绩
        double ave = 0; //平均成绩
        for (int j = 0; j < achivement[i].length; j++) {
            System.out.print(achivement[i][j] + "\t");
            if (j > 0) {
                sum += achivement[i][j];
            }
        }
        ave = sum / 3;
        System.out.print(String.format("%.2f", ave) + "\t" + (int) sum
                + "\n");
    }
}

}