创建一个桌子Table类，该类中有桌子名称，重量，桌面宽度，长度及桌子高度属性。

其中有：

　　构造函数初始化所有数据成员

　　Area() :计算桌面的面积

　　Display(): 利用toString方法,在屏幕上输出所有数据成员的值

　　ChangeWeight(int ):改变桌子重量的函数

在main()中，利用数组创建3个桌子对象，计算桌面的面积，改变桌子重量，并在屏幕上输出所有桌子数据成员的值。

-Creating a Table Table class that has a table name, weight, desktop width, length and height of the table attributes. Among them are: the constructor initializes all data members Area (): calculate the area of ​ ​ the desktop Display (): using the toString method, all the data on the screen, the output value of the member ChangeWeight (int): change the function of the weight tables in main (), the the use of an array of objects to create three tables to calculate the area of ​ ​ the desktop, changing table, weight, and output on the screen all the table data members.