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解题思路:

注意事项:

参考代码:

class Time:
    def __init__(self):
        self.__h=0    #__表示私有，防止外部访问和修改
        self.__m=0
        self.__s=0
    def Set(self,time):
        self.__h=time//3600
        self.__m=time%3600//60
        self.__s=time%60
    def Display(self):
        print(f"{self.__h}:{self.__m}:{self.__s}")
if __name__=="__main__":
    t=Time()
    time=int(input())
    t.Set(time)
    t.Display()

class Time:
    def __init__(self):
        self.h=0   #不加__表示公有，可以外部访问修改，不适合数据保护
        self.m=0
        self.s=0
    def Set(self,time):
        self.h=time//3600
        self.m=time%3600//60
        self.s=time%60
    def Display(self):
        print("%d:%d:%d"%(self.h,self.m,self.s))
if __name__=="__main__":
    t=Time()
    time=int(input())
    t.Set(time)
    t.Display()