返回到带有If/Elif/Elif的前一个变量

Question

因此，当我学习python时，我正在从事一个编码项目。这是一个相对简单的选择你自己的冒险游戏。我认为我把所有的东西都布置好了，但是当用户为var choice2选择“游泳”时，它应该给游戏带来消息并终止。然而，当我运行它，并选择“游泳”为choice2，它会给游戏的消息，但随后转移到choice11输入。我不知道自己到底做错了什么。代码如下：

print("Welcome to Treasure Island.")
print("Your mission is to find the treasure.")

choice1 = input("You\'re at a crossroad. There are three paths here. Do you want to go west, east, or south?").lower()

if choice1 == "west":
    choice2 = input("You have entered a forest clearing, with a lake in the middle. Do you wait for the ferry, "
                    "swim across, or go back east?").lower()
    if choice2 == "wait":
        choice3 = input("You board the ferry and it takes you across the lake. "
                        "You see a house. Do you enter or return across the lake?").lower()
        if choice3 == "enter":
            print("It is dark inside the house. Suddenly you hear a growl as the light flares. "
                  "You are eaten by a grue. Game Over.")
        else:
            input(choice2)
    elif choice2 == "swim":
        print("You attempt to swim across, but suddenly you are attacked by a lake monster. Game Over.")
    elif choice2 == "east":
        input(choice1)
if choice1 == "east":
    print("You come to a dead end in the forest. You are struck by several arrows from nowhere. Game Over.")
else:
    choice11 = input("You move down the path and come to a fork in the road. Do you continue south or go east?").lower()
    if choice11 == "south":
        print("You come upon a treasure chest. When you open it, it is a mimic, with sharp nasty teeth. Game Over.")
    else:
        print("You come upon a veritable treasure hoard! You win!")

Answer 1

我怀疑这是：

if choice1 == "east":

应该是这样：

elif choice1 == "east":

当前代码中发生的情况是，整个第一个if choice1 == "west"块是独立的。因此，在"choice2“逻辑完成后，整个if块就会退出。然后，代码转到下一个if块，即if choice1 == "east"。该条件是false，因此控件进入else块。

通过使第二个顶级if成为一个elif，您可以将所有三个顶级块放入相同的整体条件计算中。

Answer 2

print("Welcome to Treasure Island.")
print("Your mission is to find the treasure.")

choice1 = input("You\'re at a crossroad. There are three paths here. Do you want to go west, east, or south?").lower()

if choice1 == "west":
    choice2 = input("You have entered a forest clearing, with a lake in the middle. Do you wait for the ferry, "
                    "swim across, or go back east?").lower()
    if choice2 == "wait":
        choice3 = input("You board the ferry and it takes you across the lake. "
                        "You see a house. Do you enter or return across the lake?").lower()
        if choice3 == "enter":
            print("It is dark inside the house. Suddenly you hear a growl as the light flares. "
                  "You are eaten by a grue. Game Over.")
        else:
            input(choice2)
    elif choice2 == "swim":
        print("You attempt to swim across, but suddenly you are attacked by a lake monster. Game Over.")
    elif choice2 == "east":
        input(choice1)
elif choice1 == "east":
    print("You come to a dead end in the forest. You are struck by several arrows from nowhere. Game Over.")
else:
    choice11 = input("You move down the path and come to a fork in the road. Do you continue south or go east?").lower()
    if choice11 == "south":
        print("You come upon a treasure chest. When you open it, it is a mimic, with sharp nasty teeth. Game Over.")
    else:
        print("You come upon a veritable treasure hoard! You win!")

Answer 3

你基本上是对的。为了结束程序，您需要使用exit() (它将提示用户关闭程序)，或者使用带有函数的return 0。这将由returning False自动结束程序。以下是你如何做到的：

def adventure():
  print("Welcome to Treasure Island.")
  print("Your mission is to find the treasure.")

  choice1 = input("You\'re at a crossroad. There are three paths here. Do you want to go west, east, or south?").lower()

  if choice1 == "west":
    choice2 = input("You have entered a forest clearing, with a lake in the middle. Do you wait for the ferry, "
                    "swim across, or go back east?").lower()
    if choice2 == "wait":
        choice3 = input("You board the ferry and it takes you across the lake. "
                        "You see a house. Do you enter or return across the lake?").lower()
        if choice3 == "enter":
            print("It is dark inside the house. Suddenly you hear a growl as the light flares. "
                  "You are eaten by a grue. Game Over.")
            return 0  # Here you need to use it
        else:
            input(choice2)
    elif choice2 == "swim":
        print("You attempt to swim across, but suddenly you are attacked by a lake monster. Game Over.")
        return 0 # Here you need to use it
    elif choice2 == "east":
        input(choice1)
  elif choice1 == "east": # Also, this should be an elif as you already have an if statement i.e. if choice1 == "west"
    print("You come to a dead end in the forest. You are struck by several arrows from nowhere. Game Over.")
    return 0    # Here you need to use it 
  else:
    choice11 = input("You move down the path and come to a fork in the road. Do you continue south or go east?").lower()
    if choice11 == "south":
        print("You come upon a treasure chest. When you open it, it is a mimic, with sharp nasty teeth. Game Over.")
        return 0 # Here you need to use it
    else:
        print("You come upon a veritable treasure hoard! You win!")

adventure()

输出：

Welcome to Treasure Island.
Your mission is to find the treasure.
You're at a crossroad. There are three paths here. Do you want to go west, east, or south?west
You have entered a forest clearing, with a lake in the middle. Do you wait for the ferry, swim across, or go back east?swim
You attempt to swim across, but suddenly you are attacked by a lake monster. Game Over.

您所做的大多数事情都是正确的，但困扰我的一件事是，您在某些行中使用了input(choice1)或input(choice2)。我想你想要的是再次接受这个输入，对吗？再考虑一次，因为这样做根本行不通。