Eclipse CDT的＆QUOT;符号NULL无法解析＆QUOT; [英] Eclipse CDT "Symbol NULL could not be resolved"

问题描述

我刚安装了的Eclipse CDT 与的MinGW 。
所有设置环境变量，包括等尝试运行一个Hello World，一切似乎要被罚款。

I just installed Eclipse CDT with MinGW. All the environment variables are set, includes, etc. Tried running a hello world and everything seems to be fine.

我试图加载 C 的项目，我在我的电脑前了，它似乎加载一切都很好，但我得到了 NULL 符号：

I tried loading a C project that I had before in my computer, it seems to load everything fine, yet I get the following error with the NULL symbol :

Symbol 'NULL' could not be resolved

任何见解？谢谢！

Any insights? Thanks!

推荐答案

NULL通常是在STDDEF.H定义。此文件也通常包含在文件stdlib.h和stdio.h中。

NULL is usually defined in stddef.h. This file is also usually included with stdlib.h and stdio.h.

和，你总是可以做到这一点：

And, you could always do this:

#ifndef NULL
#define NULL   ((void *) 0)
#endif

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