1. 声明 Point 类，有坐标_x，_y 两个成员变量；对 Point 类重载“++”（自增）、“--”（自减）运算符，实现对坐标值的改变。

2. 声明一个车（vehicle）基类，有 Run、Stop 等成员函数，由此派生出自行车（bicycle）类、汽车（motorcar）类，从 bicycle 和 motorcar 派生出摩托车（motorcycle）类，它们都有 Run、Stop 等成员函数。观察虚函数的作用。

1. 编写程序 Node.h 实现例 9-5 的节点类，并编写测试程序 lab9_1.cpp 实现链表的基本操作。

2. 编写程序 link.h 实现例 9-6 的链表类。在测试程序 lab9_2.cpp 中声明两个整型链表 A和 B，分别插入 5 个元素，然后把 B 中的元素加入 A 的尾部。

3. 编写程序 queue.h，用链表实现队列（或栈）类。在测试程序 lab9_3.cpp 中声明一个 整型队列（或栈）对象，插入 5 个整数，压入队列（或栈），再依次取出并显示出来。

-1 Point class declaration, coordinates _x, _y two member variables　pairs Point class overloads " ++"　(increment), " -"　(decrement) operator to achieve the coordinate values ​ ​ change. (2) declare a car (vehicle) base class, with Run, Stop and other member functions, and derives a bike (bicycle), automobiles (motorcar) class derived from the bicycle and motorcar motorcycle (motorcycle) class, which are with Run, Stop and other member functions. Observe the role of virtual function. 1 Write a program to achieve cases 9-5 Node.h node classes and preparation of test procedures lab9_1.cpp realize list of basic operations. (2) Write a program link.h achieve cases 9-6 objectlist. In the test program lists lab9_2.cpp declare two integers A and B, five elements were inserted, and then B is added to A end of the elements. 3 programming queue.h, using chain queue (or stack) classes. In the test program lab9_3.cpp declare an integer queue (or stack) object, insert fiv