Inform7 中的嵌套 if 条件

Question

我正在Inform7中实现一个没有任何扩展的电话。

Calling is an action applying to one topic.
Understand "Call [text]" or "[text] call" as calling.
Carry out Calling:
    if the topic understood matches "Melissa":
        say "You are calling Melissa … 'are you fine?'";
        if player consents:
            say "good???";
        otherwise:
            say "I see!";
    if the topic understood matches "Dad":
         say "Hey boy";
    otherwise:
        say "beeeeep – [the topic understood] is not answering";

因此，如果我打电话给爸爸，该程序就会起作用。但是如果我打电话给梅丽莎，她正在回答问题，当玩家同意时，整个过程就会失败：

>call melissa
You are calling Melissa … 'are you fine?'
yes
good???
beeeep -  
*** Run-time problem P39: Attempt to say a snippet value which is currently invalid: words 2 to 2.
  is not answering
>

Answer 1

当你有这个结构时

if A
   ...
if B
   ...
otherwise
   ...

然后，otherwise块将在B不匹配的任何情况下执行。

另一方面，如果你有

if A
   ...
otherwise if B
   ...
otherwise
   ...

那么，如果A和B都不匹配，则将执行otherwise块。

所以在你的情况下，你的

if the topic understood matches "Dad":

应该是

otherwise if the topic understood matches "Dad":