Eclipse CDT：无法解析符号'cout' [英] Eclipse CDT: Symbol 'cout' could not be resolved

问题描述

错误如上。我有什么应该是所有必要的文件包括在eclipse项目：

  / usr / include / c ++ / 4.6 
 / usr / include 
 / usr / include / linux 
 / usr / local / include 
  

$ b b

等。

我尝试了 std :: cout 和 using namespace std; cout ，但它仍然说未解决。

我已导入 iostream 和 cstdlib p>

此外，我在Ubuntu 12.04上使用eclipse 3.7.2。

代码片段：

  #include< cstdio> 
 #include< cstdlib> 
 #include< cstring> 
 #include< iostream> 
 #includeXPLMDisplay.h
 #includeXPLMGraphics.h
 
 int XPluginStart（char * outName，char * outSig，char * outDesc）{
 / * ... * / 
 std :: cout<< test<< std :: endl; 
 / * ... * / 
} 
  

using namespace std;

---

更新：我已经从现有代码创建了eclipse项目。创建一个新的c ++项目修复它。我会接受一个答案，解释现有项目中的设置可能会导致这种情况（所以我不必剪切和粘贴我的所有项目）。

解决方案

很可能你有一些系统特定的包括目录丢失在您的设置，这使索引器不能正确解析iostream，从而错误。选择索引 - >在项目的上下文菜单中搜索未解析的包含将为您提供未解析的包含列表，您可以在 / usr / include 在项目属性中包含 C ++包含路径和符号

的目录。

在我的系统上，我不得不添加 / usr / include / c ++ / 4.6 / x86_64-linux-gnu 为 bits / c ++ config.h

在添加include目录后不要忘记重建索引（Index - > Rebuild）。

The error is as above. I have what should be all the necessary files include in the eclipse project:

/usr/include/c++/4.6
/usr/include
/usr/include/linux
/usr/local/include

etc.

I tried std::cout and using namespace std; cout but it still says unresolved.

I have imported iostream and cstdlib.

Also, I'm on Ubuntu 12.04 with eclipse 3.7.2.

Code snippet:

#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <iostream>
#include "XPLMDisplay.h"
#include "XPLMGraphics.h"

int XPluginStart(char * outName,  char * outSig,  char * outDesc) {
    /* ... */
    std::cout << "test" << std::endl;
    /* ... */
}

using namespace std;

---

UPDATE: I had created the eclipse project from existing code. Creating a new c++ project fixes it. I'll accept an answer that explains what setting in the existing project could cause this (so I don't have to cut & paste all my projects).

解决方案

Most likely you have some system-specific include directories missing in your settings which makes it impossible for indexer to correctly parse iostream, thus the errors. Selecting Index -> Search For Unresolved Includes in the context menu of the project will give you the list of unresolved includes which you can search in /usr/include and add containing directories to C++ Include Paths and Symbols in Project Properties.

On my system I had to add /usr/include/c++/4.6/x86_64-linux-gnu for bits/c++config.h to be resolved and a few more directories.

Don't forget to rebuild the index (Index -> Rebuild) after adding include directories.

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