java作业之输入n个学生的m门课程求每个学生的总分和平均分。。。

import java.util.Scanner;
public class Hzf_4 {

    public static void main(String[] args) {
        int i,j,n,m,score = 0,sum = 0;
        float average = 0;
        System.out.println("请输入学生人数及课程数：");
        Scanner sca = new Scanner(System.in);
        n = sca.nextInt();
        m = sca.nextInt();
        for(i = 1;i<=n;i++){
            sum = 0;
            for(j = 1;j<=m;j++){
                System.out.println("请输入第"+i+"个学生的"+j+"门课程成绩：");
                Scanner sca1 = new Scanner(System.in);
                sum += sca1.nextInt();
            }
            average = (float)sum/m;
            System.out.println("第"+i+"个学生的总成绩为："+sum+"平均分为："+average);
        }

    }

}