练习：类 乌龟吃鱼小游戏
1:场景范围(x,y) 0<=x<=10, 0<=y<=10
2:游戏生成1只乌龟和10只小鱼
3：移动方向随机
4：乌龟的最大移动能力是2，(可以随机选择移动距离是1还是2)，鱼儿的最大移动能力是1
5：移动到边缘时，自动反方向移动
6：乌龟初始化体力为1,每移动一次消耗1，鱼儿没有体力
7：当乌龟和鱼儿坐标重合时，鱼儿被乌龟吃掉，体力增长20
8：乌龟体力为0时，乌龟挂掉。或者鱼儿数量为0时，游戏结束
1 import random as r 2 3 legal_x=[0,10] 4 legal_y=[0,10] 5 6 class Turtle: 7 def __init__(self): #构造器，实例对象创建时调用 8 #初始体力 9 self.power=100 10 #初始化位置 11 self.x=r.randint(legal_x[0],legal_x[1]) 12 self.y=r.randint(legal_y[0],legal_y[1]) 13 14 def move(self): 15 #随机计算方向并移动到新的位置 16 new_x=self.x + r.choice([1 , 2 , -1 , -2]) #随机选择移动距离 17 new_y=self.y + r.choice([1 , 2 , -1 , -2]) 18 19 #检查x是否超出场景 20 if new_x < legal_x[0]: 21 self.x = legal_x[0]-(new_x-legal_x[0]) 22 elif new_x > legal_x[1]: 23 self.x = legal_x[1] - (new_x-legal_x[1]) 24 else: 25 self.x = new_x 26 27 #检查y是否超出场景 28 if new_y < legal_y[0]: 29 self.y = legal_y[0] - ( new_y-legal_y[0]) 30 elif new_y > legal_y[1]: 31 self.y = legal_y[1] - (new_y - legal_y[1]) 32 else: 33 self.y = new_y 34 35 self.power -= 1 36 return (self.x,self.y) 37 38 def eat(self): 39 self.power+=20 40 if self.power>100: 41 self.power=100 42 print(turtle.power) 43 44 class Fish: 45 def __init__(self): 46 self.x=r.randint(legal_x[0],legal_x[1]) 47 self.y=r.randint(legal_y[0],legal_y[1]) 48 49 def move(self): 50 new_x=self.x + r.choice([1,-1]) 51 new_y=self.y + r.choice([1,-1]) 52 #检查x是否超出场景 53 if new_x < legal_x[0]: 54 self.x = legal_x[0]-(new_x-legal_x[0]) 55 elif new_x > legal_x[1]: 56 self.x = legal_x[1] - (new_x-legal_x[1]) 57 else: 58 self.x = new_x 59 60 #检查y是否超出场景 61 if new_y < legal_y[0]: 62 self.y = legal_y[0] - ( new_y-legal_y[0]) 63 elif new_y > legal_y[1]: 64 self.y = legal_y[1] - (new_y - legal_y[1]) 65 else: 66 self.y = new_y 67 68 return (self.x , self.y) 69 70 turtle = Turtle() 71 fish = [] 72 73 for i in range(10): 74 new_fish=Fish() 75 fish.append(new_fish) 76 while True: 77 if not len(fish): 78 print("鱼儿都吃光啦，游戏结束！") 79 break 80 if not turtle.power: 81 print("乌龟的体力耗尽，挂掉了") 82 break 83 pos = turtle.move() 84 for each_fish in fish[:]: 85 if each_fish.move() == pos: 86 #鱼儿被吃掉 87 turtle.eat() 88 fish.remove(each_fish) 89 print("有条鱼儿被吃掉了,还剩%d条" % len(fish))
