How to fix c++ static library problem in visual studio environment?

Question

C++ / C#

Hello, I have a problem, I wrote a static library in c++ and my compiler gives errors when compiling already using this library in another project ->Error 1 error LNK2019: reference to an unresolved external symbol "public: static int __cdecl mass::m_mass: :max(int ​​*,int)" ([email protected][email protected]@@[email protected]) in _wmain function C:\Users\User\Documents\Visual Studio 2012\Projects\MassivLib\ConsoleApplication3\ConsoleApplication3\ConsoleApplication3.obj ConsoleApplication3
Error 2 error LNK1120: unresolved external elements: 1 C:\Users\User\Documents\Visual Studio 2012\Projects\MassivLib\ConsoleApplication3\Debug\ConsoleApplication3.exe 1 1 ConsoleApplication3 I've been suffering for a long time
and I can't figure out what the problem is, help please!!! VERY PLEASE!!!!