python - 回合制游戏坏了

Question

这个问题已经有答案了:

Why does "a == x or y or z" always evaluate to True? How can I compare "a" to all of those? (8 个回答)

已关闭 7 年前。

我想制作一个小型回合制游戏。我只编码了轮到我的回合，并且只轮到我的回合。然而，当我执行回合时，我不会对CPU造成任何损害，并且在选择该选项时我也不会治愈自己。

import random
print("Let's play a turn based game")
print("Your moves are:")
print("")
print("1) Fire Blast(18 to 25 HP) 2) Aura Sphere(10 to 35 HP) 3) Recover(Recover 10 to 30 HP)")
print("You can go first")
playerHP = 100
cpuHP = 100
fireBlast = random.randint(18,25)
auraSphere = random.randint(10,35)
recover = random.randint(10,30)

while playerHP >= 0 or cpuHP >= 0:
    print("")
    print("You have",playerHP,"HP")
    print("I have",cpuHP,"HP")
    playerMove = input("Which move do you choose?   ")
     print("Initiate player's move!")
        if playerMove == "Fire Blast" or "fire blast":
                         cpuHP == cpuHP - fireBlast
                         print("You used Fire Blast! I now have",cpuHP,"HP")
        elif playerMove == "Aura Sphere" or "aura sphere":
                         cpuHP == cpuHP - auraSphere
                         print("You used Aura Sphere! I now have",cpuHP,"HP")
        elif playerMove == "Recover" or "recover":
                         playerHP == playerHP + recover
                         print("Healed! You now have",playerHP,"HP")
        else:
            print("You didn't choose a move...")

Answer 1

第一个问题在于 if 行:

if playerMove == "Fire Blast" or "fire blast":
    #(...)
elif playerMove == "Aura Sphere" or "aura sphere":
    #(...)
elif playerMove == "Recover" or "recover": 
    #(...)

小写值不起作用。执行此操作时，首先将评估“Fire Blast”或“fireblast”部分，从而产生“Fire Blast”值，如 bool 或两个非空字符串中的 是第一个字符串。相反，你应该使用:

if playerMove == "Fire Blast" or playerMove ==  "fire blast":
    #(...)
elif playerMove == "Aura Sphere" or playerMove == "aura sphere":
    #(...)
elif playerMove == "Recover" or playerMove == "recover": 
    #(...)

或者为了简化你可以使用 lower() :

playerMove = playerMove.lower()
if playerMove == "fire blast":
    #(...)
elif playerMove == "aura sphere":
    #(...)
elif playerMove == "recover": 
    #(...)

第二个问题是马力减法线:

cpuHP == cpuHP - fireBlast
cpuHP == cpuHP - auraSphere
playerHP == playerHP + recover

== 运算符用于比较值。你想要的是赋值运算符=:

cpuHP = cpuHP - fireBlast
cpuHP = cpuHP - auraSphere
playerHP = playerHP + recover