创建一个复数类，定义属性：实部、虚部。定义方法：复数加法、复数减法、复数乘法、求实部，求虚部，将复数输出，判断两个复数相等。通过一个类举例验证这些方法-Create a complex number class, custom attributes: the real part, imaginary part. Definition method: complex addition, complex subtraction, multiplication, complex, realistic Department, seeking the imaginary part, the complex output, determine the two complex numbers are equal. Verified through a class example of these methods