Python OOP - practice_3

class Ticket():
    def __init__(self, weekend = False, child = False):
        self.exp = 100
        if weekend:
            self.inc = 1.2
        else:
            self.inc = 1
            
        if child:
            self.discount = 0.5
        else:
            self.discount = 1
        
    def cal_price(self, num):
        return self.exp * self.inc * self.discount * num
    
adult = Ticket()
child = Ticket(child = True)
print("两个成年人和一个小孩子平日的价格是{}".format(adult.cal_price(2) + child.cal_price(1)))

adult = Ticket(weekend = True)
child = Ticket(weekend = True, child = True)
print("两个成年人和一个小孩子周末的价格是{}".format(adult.cal_price(2) + child.cal_price(1)))

两个成年人和一个小孩子平日的价格是250.0

两个成年人和一个小孩子周末的价格是300.0

import random as r

class Turtle(object):
    
    def __init__(self):
        self.power = 100
        
        # 初始化乌龟的位置
        self.x = r.randint(0,10)
        self.y = r.randint(0,10)
        
    def move(self):
        new_x = r.choice([1,2,-1,-2]) + self.x
        new_y = r.choice([1,2,-1,-2]) + self.y
        
        # 判断乌龟的移动是否超出了边界
        
        if new_x < 0:
            self.x = 0 - (new_x - 0)       # 反方向
        elif new_x > 10:
            self.x = 10 - (new_x - 10)
        else:
            self.x = new_x
    
        if new_y < 0:
            self.y = 0 - (new_y - 0)
        elif new_y > 10:
            self.y = 10 - (new_y - 10)
        else:
            self.y = new_y
        
        self.power -= 1
        return (self.x, self.y)
    
    def eat(self):
        self.power += 20
        if self.power >= 100:
            self.power = 100
            
class Fish(object):
    
    def __init__(self):
        self.x = r.randint(0,10)
        self.y = r.randint(0,10)
        
    def move(self):
        new_x = self.x + r.choice([1,-1])
        new_y = self.y + r.choice([1,-1])
        
        # 判断鱼的移动是否超出了边界
        
        if new_x < 0:
            self.x = 0 - (new_x - 0)       # 反方向
        elif new_x > 10:
            self.x = 10 - (new_x - 10)
        else:
            self.x = new_x
    
        if new_y < 0:
            self.y = 0 - (new_y - 0)
        elif new_y > 10:
            self.y = 10 - (new_y - 10)
        else:
            self.y = new_y
            
        return (self.x, self.y)
    
turtle = Turtle()
fish = []
for i in range(10):
    new_fish = Fish()
    fish.append(new_fish)
    
while True:
    if not len(fish):
        print("鱼被吃完了，游戏结束")
        break
    if not turtle.power:
        print("乌龟体力被耗尽了，游戏结束")
        break
        
    pos = turtle.move()
    
    # 在迭代中做列表的删除元素是非常危险的，经常会出现一些意想不到的问题，
    # 因为迭代器是直接引用列表元素的数据做的操作，
    # 所以，我们这里把列表拷贝一份传给迭代器，然后再对列表做操作
    for each_fish in fish[:]:
        if each_fish.move() == pos:
            turtle.eat()
            fish.remove(each_fish)      # 移除列表中元素
            print("有一条鱼被吃掉了")

有一条鱼被吃掉了

有一条鱼被吃掉了

有一条鱼被吃掉了

有一条鱼被吃掉了

有一条鱼被吃掉了

有一条鱼被吃掉了

有一条鱼被吃掉了

有一条鱼被吃掉了

有一条鱼被吃掉了

有一条鱼被吃掉了

鱼被吃完了，游戏结束

import math

class Point(object):
    def __init__(self, x = 0, y = 0):
        self.x = x
        self.y = y
        
    def get_x(self):
        return self.x
    
    def get_y(self):
        return self.y
    
class Line(object):
    def __init__(self, p1, p2):
        self.x = p1.get_x() - p2.get_x()
        self.y = p1.get_y() - p2.get_y()
        
        self.len = math.sqrt(self.x*self.x + self.y*self.y)
        
    def get_len(self):
        return self.len
    
p1 = Point(2,3)
p2 = Point(5,7)
line = Line(p1, p2)
line.get_len()