设计一个圆类circle类c++

class Circle:
def __init__(self, radius):
self.radius = radius

def get_area(self):
return 3.14 * self.radius ** 2

def get_circumference(self):
return 2 * 3.14 * self.radius

def get_diameter(self):
return 2 * self.radius

def set_radius(self, radius):
self.radius = radius

def __str__(self):
return "Circle with radius " + str(self.radius)