python 烤土豆

class sweetpotato:

    def __init__(self):

        self.cook_level = 0
        self.cook_string = "生的"

    def __str__(self):

        if self.cook_level < 10:

            return "地瓜 %d 分熟，程度为 %s "%(self.cook_level,self.cook_string)

        else:

            return "地瓜 %s"%(self.cook_string)

    def roast(self,time):

        self.cook_level += time
        if self.cook_level < 3:
            self.cook_string = "生的"
        elif self.cook_level < 5:
            self.cook_string = "半生不熟"
        elif self.cook_level < 8:
            self.cook_string = "熟了"
        else:
            self.cook_string = "烤糊了"

def main():

    while True:

        print("是否开始烤地瓜：1是，2否")
        command = input("请输入：")

        if command == '1':

            cook = sweetpotato()
            time = int(input("请输入时间："))
            cook.roast(time)
            print(cook)

            while True:

                print("是否继续烤地瓜：1是，2否")
                a = input("请输入：")

                if a == '1':

                    time = int(input("请输入时间："))
                    cook.roast(time)
                    print(cook)

                elif a == '2':

                    break

                else:

                    print("重新输入")

        elif command == '2':

            break

        else:

            print("重新输入")

main()

首先要创建一个类，例如：class sweetpotato

以及对这个类的使用方法，例如：

cook = sweetpotato()
cook.roast()