1.设计一个处理复数运算的类，该类中至少有两个成员方法：复数加法和复数减法运算。在上述类中添加两个静态方法：求一个复数的模和求一个复数的复角。
设计一个子类，该子类继承了上述的类，并且至少拥有自己的两个方法：复数乘法和复数除法。2.编写一个线段类 MyLine，要求如下:主要属性有： x ，y ；类型为Point (查看API)编写构造方法，如 MyLine(Point　p1 , Point p2)编写5个成员方法。(1. design a class that handles complex numbers, with at least two member methods: complex plus and plural subtraction. Two static methods are added to the above class: the modulus of a complex number and the complex angle of a complex number.
Design a subclass that inherits the above class and has at least two methods of its own: plural multiplication and plural division. 2., write a line segment class MyLine. The following requirements are as follows: the main attributes are: X, y; type Point (view API) to write the construction method, such as MyLine (Point P1, Point P2) to write 5 member methods.)