class C:
    def __init__(self):
        print("class C의 인스턴스가 생성됨")
        self.name="ccc"
        self.age=0
    
    def say_hi(self):
        print("hi")
    def add_age(self,n:int):
        self.age +=n
    def __str__(self):
        return "__str__호출됨"
    def __repr__(self):
        return "__repr__호출됨"
    def __abs__(self):
        print("__abs__호출됨")
    def __len__(self):
        print("__len__호출됨")
    def __add__(self,other):
        return self.age+other.age

