多维数组

//多维数组

private static void fun23() {
    double [][] a=new double[3][];
    a[0]=new double[2];
    a[1]=new double[3];
    a[2]=new double[2];
    Scanner sc=new Scanner(System.in);
    for(int i=0;i<a.length;i++){
        int sum=0;
        for(int j=0;j<a[i].length;j++){
            System.out.println("请输入第"+(i+1)+"个班的第"+(j+1)+"个学员的成绩：");
            a[i][j]=sc.nextDouble();
            sum+=a[i][j];
        }
        System.out.println("第"+(i+1)+"个班级的总成绩是："+sum);
    }
}