I am getting the following error.

Severity Code Description Project File Line Suppression State

Error LNK2019 unresolved external symbol "public: __thiscall Interface::Interface(void)" (??0Interface@@QAE@XZ) referenced in function _main Project82 C:\Users\Owner\source\repos\Project82\Project82\main.obj 1

Error LNK2019 unresolved external symbol "public: int __thiscall Interface::getGridSize(void)" (?getGridSize@Interface@@QAEHXZ) referenced in function _main Project82 C:\Users\Owner\source\repos\Project82\Project82\main.obj 1

I am unsure of how to proceed.

Severity Code Description Project File Line Suppression State

Error C2252 an explicit instantiation of a template can only occur at namespace scope Project83 c:\users\owner\desktop\glui-2.36\glui-2.36\src\include\gl\glui.h 1720

Error C2252 an explicit instantiation of a template can only occur at namespace scope Project83 c:\users\owner\desktop\glui-2.36\glui-2.36\src\include\gl\glui.h 1721

I fixed the above error, but I am getting a new one.