定义一个高级复数类（AdvComplex），使他能继承一个复数类，该复数类的方法是：构造方法、得到实部、得到虚部、设置实部、设置虚部、复数的加法，减法，乘法，最后，创建对象进行运算。并覆盖和重载其相关的方法，并进行运算。-The definition of a senior class complex (AdvComplex), so that he could inherit a plural, the plural class methods are: construction method, get real, imaginary part, get real, imaginary setting setting, the plural of the adder, subtraction, multiplication, and finally, to create the object.And covering and overloading the related methods, and operations.