Python 我不知道'；我没有任何错误，我的循环一直在运行。我做错了什么？

我试图做一个循环，检测用户何时吃了足够的食物。这个代码对我来说很有意义，但显然是错的。我觉得这和int到str的转换有关，或者相反，但我不确定

food = 0
tries = 0
while food < 10 and tries < 3:

  food = food + int(input("How much food would you like to eat?: "))
  print("You've eaten " + str(food) + " amounts of food.")
  tries += 1
  food = food + int(input("It's not enough food. How much more would you like to eat?: "))
  print("You've eaten " + str(food) + " amounts of food.")
  tries += 1
  food = food + int(input("It's still not enough. You have one more chance to eat. How much more?: "))
  print("You've eaten " + str(food) + " amounts of food.")
  tries += 1
  print("It's too late. You're dead")
else:
  print("You've eaten enough food.")

food=0
尝试=0
当食物<10和<3时：
食物=食物+int（输入（“你想吃多少食物？”：）
打印（“你吃了”+str（食物）+“食物量”。）
尝试次数+=1
食物=食物+int（输入（“食物不够，你还想吃多少？：”）
打印（“你吃了”+str（食物）+“食物量”。）
尝试次数+=1
食物=食物+int（输入（“还不够。你还有一次机会吃东西。还有多少？：”）
打印（“你吃了”+str（食物）+“食物量”。）
尝试次数+=1
打印（“太晚了，你死了”）
其他：
打印（“你已经吃了足够的食物。”）

您没有循环，只有一个输入序列：

food = 0
food = food + int(input("How much food would you like to eat?: "))
print(f"You've eaten {food} amounts of food.")
if food < 10:
    food = food + int(input("It's not enough food. How much more would you like to eat?: "))
    print(f"You've eaten {food} amounts of food.")
    if food < 10:
        food = food + int(input("It's still not enough. You have one more chance to eat. How much more?: "))
        print(f"You've eaten {food} amounts of food.")
        if food < 10:
            print("It's too late. You're dead")
if food >= 10:
    print("You've eaten enough food.")

---

当用户输入非数字字符时会出现问题。由于

int

方法不过滤需要手动过滤的字符串。在@Daniel的代码之后，我在代码中添加了过滤。以下是实际循环的工作代码：

food = 0

def filterNonNumChars(input):
  input = str(input)
  allowedChars = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9']
  output = ""
  for i in range(0, len(input)):
      if input[i] in allowedChars:
        output += input[i]

  return output

for text in [
    "How much food would you like to eat?: ",
    "It's not enough food. How much more would you like to eat?: ",
    "It's still not enough. You have one more chance to eat. How much more?: ",
]:
    food += int(filterNonNumChars(input(text)))
    print(f"You've eaten {food} amounts of food.")
    if food >= 10:
        print("You've eaten enough food.")
        break
else:
    print("It's too late. You're dead")

---

不确定循环的逻辑。“while…else…”不常见且不清晰，可以用“while”和“if”代替，这使得逻辑清晰

food = 0
tries = 0
while food < 10 and tries < 3:
  food = food + int(input("How much food would you like to eat?: "))
  print("You've eaten " + str(food) + " amounts of food.")
  tries += 1
  food = food + int(input("It's not enough food. How much more would you like to eat?: "))
  print("You've eaten " + str(food) + " amounts of food.")
  tries += 1
  food = food + int(input("It's still not enough. You have one more chance to eat. How much more?: "))
  print("You've eaten " + str(food) + " amounts of food.")
  tries += 1
  print("It's too late. You're dead")

if (food >= 10 or tries >= 3):
  print("You've eaten enough food.")

food=0
尝试=0
当食物<10和<3时：
食物=食物+int（输入（“你想吃多少食物？”：）
打印（“你吃了”+str（食物）+“食物量”。）
尝试次数+=1
食物=食物+int（输入（“食物不够，你还想吃多少？：”）
打印（“你吃了”+str（食物）+“食物量”。）
尝试次数+=1
食物=食物+int（输入（“还不够。你还有一次机会吃东西。还有多少？：”）
打印（“你吃了”+str（食物）+“食物量”。）
尝试次数+=1
打印（“太晚了，你死了”）
如果（食物>=10或尝试>=3）：
打印（“你已经吃了足够的食物。”）

---

您可以参考

您能提供更多的上下文吗？i、 e.您在什么环境中运行此代码？什么语言？等等？虽然这个代码布局不好，但对我来说，它运行正确，循环结束。如果你说的是为什么在食物超过10后它仍继续运行，那么你的代码对我来说很好。。这是因为while部分在循环的每次迭代中只计算一次，而您的代码被编写为只运行一次迭代，因为您在一次迭代中添加了3次尝试。我想您想了解一下

break

语句的作用。while循环的整个主体将至少运行一次，因此即使第一次输入超过10，它也会再次提示用户。正如前面所说，逻辑确实很糟糕：）我也同意@jszjsz。我建议结合我们所有的代码以获得最佳结果。改进：您可以使用allowedChars中的

if str（input）[I]替换第二个for循环。。。
food = 0
tries = 0
while food < 10 and tries < 3:
  food = food + int(input("How much food would you like to eat?: "))
  print("You've eaten " + str(food) + " amounts of food.")
  tries += 1
  food = food + int(input("It's not enough food. How much more would you like to eat?: "))
  print("You've eaten " + str(food) + " amounts of food.")
  tries += 1
  food = food + int(input("It's still not enough. You have one more chance to eat. How much more?: "))
  print("You've eaten " + str(food) + " amounts of food.")
  tries += 1
  print("It's too late. You're dead")

if (food >= 10 or tries >= 3):
  print("You've eaten enough food.")