题解 | #班级成绩输入输出#

package main; import java.io.*; public class Main { public static void main(String[] args) throws IOException {//按要求根据题目分组写二维数组
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); double[][] a = new double[5][5]; //        List list = new ArrayList<>();    double[] b = new double[5];  for (int i=0;i<5;i++){
            String[] st = br.readLine().split(" "); for (int j=0;j<5;j++){
            a[i][j] = Double.parseDouble(st[j]);
            b[i]+=a[i][j];
            }
        } for (int i=0;i<5;i++){ for (int j =0;j<5;j++){
                System.out.printf("%.1f ",a[i][j]);
            }
            System.out.printf("%.1f ",b[i]);
            System.out.println(" ");
        }

    }
}