error , Symbol 'vector' could not be resolved

Question

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

Answer 1

Apparently vector belongs to C++ standard template library from MinGW perspective. so in addition to

 #include <vector>

Add

using namespace std;

after the header file inclusions.

Answer 2

See Also related question: Eclipse CDT: Symbol 'cout' could not be resolved

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>

i.e.: /usr/include/c++/4.6/x86_64-linux-gnu

Answer 3

I know that this problem was already solved, but it still appears as the top result on Google.

Using Eclipse Neon for Linux I solved it with Quick Fix:

• right click at "vector" in the editor,
• then "Quick Fix"

Answer 4

Created a *.cpp file that includes the *.h where the error is showing. This will force Eclipse to backtrace dependencies for *.h.
Is working for me...

Answer 5

#include<vector>

should be included at top.

Answer 6

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.