python中如何使变量相减

Question

我试着做一个基本的RNG格斗，这样人们就可以复制和粘贴它，并用于我们学校的游戏，但我需要一方面的帮助

import random
print("Your Weapon's Stats")
print("         /^\\        ")
print("         | |         ")
print("         | |         ")
print("         | |         ")
print("         | |         ")
print("         | |         ")
print("       \\\=*=//      ")
print("          |          ")
print("         (+)         ") 
print("(+)~~~~~~~~~~~~~~~(+)")
print(" | Damage:         | ")
print(" | 1-9             | ") 
print(" | Attack Speed:   | ")
print(" | 6/10            | ")
print(" | Critical Chance:| ") 
print(" | 64%             | ")
print("(+)~~~~~~~~~~~~~~~(+)")
your_damage = random.choice("12345789")
enemy_health = 20
enemy_health - your_damage <---it says that not right so what do I do?
print(enemy_health)

Answer 1

实际上，您并没有将新值赋给enemy_health，因此要执行以下操作：

enemy_health = enemy_health - your_damage

可以使用-=运算符简化

所以：

enemy_health -= your_damage

对random.choice的用法进行评论。您所做的几乎是正确的，但是，您希望使用整数列表而不是数字字符串。所以你可以这样做：

random.choice([1, 2, 3, 4, 5, 6, 7, 8, 9, 10])

更妙的是：

random.choice(range(1, 10))

Answer 2

您需要使用-=运算符从enemy_health中减去your_damage：

enemy_health -= your_damage

这相当于写入enemy_health = enemy_health - your_damage

您还需要将random.choice("12345789")更改为random.randint(1, 9)。这将选择一个介于1和9之间的随机整数，从而确保your_damage是一个数字而不是一个字符串

您的代码应该是：

import random

print("Your Weapon's Stats")
print("         /^\\        ")
print("         | |         ")
print("         | |         ")
print("         | |         ")
print("         | |         ")
print("         | |         ")
print("       \\\=*=//      ")
print("          |          ")
print("         (+)         ")
print("(+)~~~~~~~~~~~~~~~(+)")
print(" | Damage:         | ")
print(" | 1-9             | ")
print(" | Attack Speed:   | ")
print(" | 6/10            | ")
print(" | Critical Chance:| ")
print(" | 64%             | ")
print("(+)~~~~~~~~~~~~~~~(+)")

your_damage = random.randint(1, 9)
enemy_health = 20
enemy_health -= your_damage

print(enemy_health)