字符串终止 - 焦C = 0对焦炭C ='\\ 0' [英] String termination - char c=0 vs char c='\0'

问题描述

在终止字符串，在我看来，这在逻辑上字符C = 0 等同于的char c ='\\ 0'，因为空（ASCII 0）字节是 0 ，但通常人们倾向于做'\\ 0'来代替。这是纯粹出于preference，或者它应该是一个更好的惯例？

When terminating a string, it seems to me that logically char c=0 is equivalent to char c='\0', since the "null" (ASCII 0) byte is 0, but usually people tend to do '\0' instead. Is this purely out of preference or should it be a better "practice"?

什么是preferred选择？

What is the preferred choice?

编辑： K＆安培; R 的 是的：字符常量'\\ 0 重新presents值为零的字符，空字符。'\\ 0'经常写，而不是 0 来强调一些前pression的性格本质，但数值只是 0 。

K&R says: "The character constant '\0' represents the character with value zero, the null character. '\0' is often written instead of 0 to emphasize the character nature of some expression, but the numeric value is just 0.

推荐答案

<一个href=\"http://en.wikipedia.org/wiki/Ascii#ASCII_control_$c$c_chart\">http://en.wikipedia.org/wiki/Ascii#ASCII_control_$c$c_chart

Binary   Oct  Dec    Hex    Abbr    Unicode  Control char  C Escape code   Name
0000000  000  0      00     NUL     ␀       ^@            \0              Null character

有什么区别，但更地道的是'\\ 0'。

There's no difference, but the more idiomatic one is '\0'.

也许把它放下为的char c = 0; 可能意味着你打算用它作为一个数字（如柜台），虽然我个人不会来跨code这样。 '\\ 0'是毫不含糊的。

Perhaps putting it down as char c = 0; could mean that you intend to use it as a number (e.g. a counter), although I've personally not come across code like that. '\0' is unambiguous.

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