Getche - 输入密钥 [英] Getche - Enter key

问题描述

我知道以下说明：


char c;

c = getche（）;


...读一个角色。如果我输入''g''，那么c ==''g''。但是，如果我按下箭头，Enter键，Del键等，那么同样如此...？

I know that the following instructions:

char c;
c=getche();

...read a character. If I type, for example, ''g'', then c==''g''. But what is equally c with if I press an arrow, the Enter key, the Del key etc.?

推荐答案

在ASCII表中查找这些键的值。


或者，将c赋值给int并显示int。

Look in the ASCII table for the values of these keys.

Or, assign c to an int and display the int.

查看这些键的值的ASCII表。

或者，将c赋给int并显示int。

Look in the ASCII table for the values of these keys.
Or, assign c to an int and display the int.

最好通过打印各种按键的c值来自行调查。那是因为：

1. ASCII编码可能无处不在，但是没有法律（或标准）要求你的系统使用ASCII。

2.一些键表示为转义序列，其中单个按键生成字符流。要检测到这一点，你想在getche上连续循环，打印出你得到的十六进制文本。

Better to investigate this yourself by printing out the value of c for various keypresses. That''s because:
1. ASCII encoding may be ubiquitous, but there is no law (or Standard) that requires your system to use ASCII.
2. Some keys are expressed as escape sequences, where a single keypress generates a stream of characters. To detect this, you want to loop continuously on getche, printing out whatever you get as hexadecimal text.

1. ASCII编码可能是无处不在，但没有法律（或标准）要求你的系统使用ASCII。

2.某些键表示为转义序列，其中一个按键生成一个字符流。要检测到这种情况，您需要在getche上连续循环，以十六进制文本的形式打印出任何内容。

1. ASCII encoding may be ubiquitous, but there is no law (or Standard) that requires your system to use ASCII.
2. Some keys are expressed as escape sequences, where a single keypress generates a stream of characters. To detect this, you want to loop continuously on getche, printing out whatever you get as hexadecimal text.

是的，标准不要求ASCII，但我还没有看到在Unix / Linux或Windows上运行的C版本没有使用它。并不是说在某个地方有一个5位字符没有C潜伏。


一个按键生成一个字符流的例子是什么？而且我并不是靠靠钥匙说自动重复。 Autorepeat只是一个快速打字员。

Yes, ASCII is not required by the standard but I have yet to see a version of C running on Unix/Linux or Windows that doesn''t use it. Not to say there isn''t a C lurking somewhere with a 5-bit char.

What is an example of one keypress generating a stream of characters? And I don''t mean autorepeat by leaning on the key. Autorepeat is just a fast typist.

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