Java黑皮书编程练习题8.1

import java.util.Scanner;

public class Exercise08_01 {
    public static void main(String[] args) {
        double[][] array=new double[3][4];
        Scanner input=new Scanner(System.in);
        System.out.println("Enter a 3-by-4 matrix row by row ");
        //打印二维数组
        for (int row=0;row