问题描述
我想知道如何不同 - 为C preprocessors ++和 C 是
I am wondering how different the preprocessors for C++ and C are.
究其原因，问题是，this在$ P $特定pprocessor，问题在哪里，解决问题的标准段有不同的写法（和不同的款号）问题，也有关于真正的差异和用C虚假关键字++。
The reason for the question is this question on a preprocessor-specific question where the paragraph of the standard that addresses the question has a different wording (and a different paragraph number) and also are difference concerning the true and false keywords in C++.
那么，还有更多的差异或者这是唯一的区别。
So, are there more differences or is this the only difference.
当是一个C ++ preprocessor和 C preprocessor发出不同的源文件中的问题的扩展会。
An extension of the question would be when is a source file emitted differently by a C++ preprocessor and a C preprocessor.
推荐答案
C ++的03 preprocessor（至少意在）类似C99之前的C preprocessor。虽然措辞和号段略有不同，唯一的技术差异，我知道这两者之间是C ++的preprocessor处理有向图和通用字符的名称，这是不是在C present。
The C++03 preprocessor is (at least intended to be) similar to the C preprocessor before C99. Although the wording and paragraph numbers are slightly different, the only technical differences I'm aware of between the two are that the C++ preprocessor handles digraphs and universal character names, which are not present in C.
由于C99的中，C preprocessor补充说，不C的当前版本存在着一些新的功能（例如，复杂的宏）++。我不记得是肯定的，但并不认为加连字。
As of C99, the C preprocessor added some new capabilities (e.g., variadic macros) that do not exist in the current version of C++. I don't remember for sure, but don't believe that digraphs were added.
我相信的C ++ 0x将再次带来线两（至少是这样的意图）。同样，段落编号和措辞也不会完全相同，但我相信其意图是，他们应该工作相同（除保留上述差异）。
I believe C++0x will bring the two in line again (at least that's the intent). Again, the paragraph numbers and wording won't be identical, but I believe the intent is that they should work the same (other than retaining the differences mentioned above).
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