实现Point类的完整程序，构造函数，拷贝构造函数，成员函数的实现返回值为Point类对象的函数 -Complete program of the Point class constructor, copy constructor, the member function implementation returns a function of the value of the Point class objects

采用构造函数实现不同地区话费的不同计费标准，对通话进行计费。-Different regions is realized by using the constructor calls different charging standard, calls for billing.