class Thermostat:
    def __init__(self, temp):
            self.temp = temp

    def check_status(self):
        if self.temp >= 28:
            print("에어컨 가동")
        elif self.temp <= 18:
            print("히터 가동")


temperature = Thermostat(30)
temperature.check_status()

temperature = Thermostat(15)
temperature.check_status()