libpq: which lib files should I use

Question

I used the PostgreSQL as my data base and I am coding a c++ project, so I have to use the libpq to connect it.

I have already found the include file and lib file in the PostgreSQL file but there are too many files. I think I don't need to add them all.
For the include file, I just added libpq-fe.h , pg_config_ext.h and postgres_ext.h , then I included the libpq-fe.h , it seems that everything goes well, I can call some functions such as PQconnectdb , PQexec etc. But when I compile it, I get some LNK errors, meaning that I didn't add the right lib files.
I've tried to add libpq.lib and libpq.dll , but I still got the LNK errors.
Does someone know which lib files should I add?

Answer 1

I got this error because of the wrong version.
Here is a same problem which has been solved.