在游戏Snake中,用户输入选项,游戏将您带到该选项,而无需按Enter键。你是怎么做到的?
但请记住我是初学者,所以请向我解释一下你认为很难的事情。这个游戏可以在http://www.dostips.com/forum/viewtopic.php?f=3&t=4741
找到答案 0 :(得分:2)
dbenham
制作的蛇码非常复杂,但由于你的问题仅限于输入机制,因此不存在问题。
这个蛇游戏使用choice
命令,该命令只需要按下指定的键,而不按下按键。根据用户按下的键,变量errorlevel
将更改为选项列表中该字符的数字位置。
在帮助屏幕中输入choice /?
。这是一段摘录:
CHOICE [/C choices] [/N] [/CS] [/T timeout /D choice] [/M text]
Description:
This tool allows users to select one item from a list
of choices and returns the index of the selected choice.
Parameter List:
/C choices Specifies the list of choices to be created.
Default list is "YN".
/N Hides the list of choices in the prompt.
The message before the prompt is displayed
and the choices are still enabled.
/CS Enables case-sensitive choices to be selected.
By default, the utility is case-insensitive.
/T timeout The number of seconds to pause before a default
choice is made. Acceptable values are from 0 to
9999. If 0 is specified, there will be no pause
and the default choice is selected.
/D choice Specifies the default choice after nnnn seconds.
Character must be in the set of choices specified
by /C option and must also specify nnnn with /T.
/M text Specifies the message to be displayed before
the prompt. If not specified, the utility
displays only a prompt.
/? Displays this help message.
以下是一个例子:
C:\> set errorlevel=-1
C:\> choice /c "YN" /m "Yes or No"
Yes or No: [Y,N]? Y
C:\> Echo %errorlevel%
1
C:\>