Linux 错误，符号“向量”无法解析
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error , Symbol 'vector' could not be resolved
提问by Umair Zaman
I am using eclipse in linux to develop a c++ application and I am getting this editor annotation error "Symbol 'vector' could not be resolved" from the following code lines
我在 linux 中使用 eclipse 来开发一个 c++ 应用程序，我从以下代码行收到此编辑器注释错误“符号‘向量’无法解析”
std::vector<unsigned char> buffer;
I feel that some library is missing or the paths are not set. I explicitly downloaded STL but its of no use. Do I have to re install GCC on my linux ?
我觉得缺少某些库或未设置路径。我明确下载了 STL 但它没有用。我必须在我的 linux 上重新安装 GCC 吗？
回答by StevieG
You need to include the STL vector definition in your program. Put:
您需要在程序中包含 STL 向量定义。放：
#include <vector>
at the top of your file and it should work.
在文件的顶部，它应该可以工作。
回答by iammilind
#include<vector>
should be included at top.
应该包括在顶部。
回答by J0HN
#include <vector>
Also, std::vector is template type, so you have to use it like
另外， std::vector 是模板类型，所以你必须像这样使用它
std::vector<char> buffer;
回答by Lightness Races in Orbit
I feel that some library is missing or the paths are not set.
我觉得缺少某些库或未设置路径。
Yes, this sounds like a linker error. Linkers deal with symbols.
是的，这听起来像是链接器错误。链接器处理符号。
I explicitly downloaded STL but its of no use.
我明确下载了 STL 但它没有用。
Hopefully you mean libstdc++, GNU's implementation of the C++ Standard Library, and you probably shouldn't have done this. Your toolchain comes with the proper stdlib implementation.
希望您指的是 libstdc++，GNU 对 C++ 标准库的实现，您可能不应该这样做。您的工具链带有正确的 stdlib 实现。
Do I have to re install GCC on my linux?
我必须在我的 linux 上重新安装 GCC 吗？
Probably wise. And let this installation handle the standard library.
大概是明智的。并让此安装处理标准库。
Also, on the off-chance that you're playing with your compilation command line, remember to invoke g++notgcc; g++automatically links in the C++ runtimes and stdlib implementation, whereas gccis designed for C.
此外，如果您正在使用编译命令行，请记住调用g++notgcc; g++在 C++ 运行时和 stdlib 实现中自动链接，而gcc专为 C 设计。
回答by RDH
In Eclipse, right-click on the project name...Select Index...Rebuild.
在 Eclipse 中，右键单击项目名称...选择 Index...Rebuild。
回答by wgodoy
I had the same issue. I believe the problem arises from how std:: autocompletion is updated. Eclipse should be getting this from the Path and Symbols, but it could be buggy. I had to clean all Eclipse settings after upgrading gcc (thus, g++), since you're in Linux it's under your home folder ~/.eclipse/.
我遇到过同样的问题。我相信问题出在 std:: 自动完成的更新方式上。Eclipse 应该从 Path 和 Symbols 中得到这个，但它可能有问题。升级 gcc（因此，g++）后，我必须清除所有 Eclipse 设置，因为您使用的是 Linux，它位于您的主文件夹 ~/.eclipse/ 下。
Thus,
因此，
1) Re-started Eclipse after cleaning ~/.eclipse/.
1) 清理 ~/.eclipse/ 后重新启动 Eclipse。
2) checked that Path and Symbols (under right-click on project > General > Path and Symbols) included all the upgraded gcc and c++ include directories (vector should be under ./gcc/version/include/c++/version/)
2）检查路径和符号（在右键单击项目>常规>路径和符号下）包括所有升级的gcc和c++包含目录（向量应该在./gcc/version/include/c++/version/下）
3) Rebuild index.
3) 重建索引。
4) Created a *.cpp file that includes the *.h where the error is showing. This will force Eclipse to backtrace dependencies for *.h.
4) 创建了一个 *.cpp 文件，其中包含显示错误的 *.h。这将强制 Eclipse 回溯 *.h 的依赖项。
5) Rebuild index and/or restart a few times as required, now I can see vector at the end of std:: autocompletion.
5）根据需要重建索引和/或重新启动几次，现在我可以在 std:: 自动完成的末尾看到向量。
(see picture)
（见图）
Hope it helps!
希望能帮助到你！
回答by guangge
Created a *.cppfile that includes the *.hwhere the error is showing. This will force Eclipse to backtrace dependencies for *.h.
Is working for me...
创建了一个*.cpp包含*.h错误显示位置的文件。这将强制 Eclipse 回溯*.h.
正在为我工作...
回答by Alex
See Also related question: Eclipse CDT: Symbol 'cout' could not be resolved
另请参阅相关问题：Eclipse CDT：无法解析符号“cout”
for me the problem was that in #include <vector>somewhere there is #include <bits/c++config>which has a different include path than #include <vector>
对我来说问题是在#include <vector>某个地方有#include <bits/c++config>一个不同的包含路径#include <vector>
i.e.: /usr/include/c++/4.6/x86_64-linux-gnu
IE： /usr/include/c++/4.6/x86_64-linux-gnu
回答by Ahmed_Faraz
adding #include< vector >and using namespace std;solved my problem
添加#include<vector>并使用命名空间 std；解决了我的问题
回答by Ahmed_Faraz
I know that this problem was already solved, but it still appears as the top result on Google.
我知道这个问题已经解决了，但它仍然出现在谷歌上的最高结果。
Using Eclipse Neonfor LinuxI solved it with Quick Fix:
使用Eclipse Neonfor Linux我解决了它Quick Fix：
- right click at "vector" in the editor,
- then "Quick Fix"
- 右键单击编辑器中的“矢量”，
- 然后“快速修复”
