How do I fix the 'unresolved external symbol' error in Visual Studio?

How do I fix the 'unresolved external symbol' error in Visual Studio?

This error usually occurs when the linker cannot find the definition of a function or variable. Have you checked if you've included the correct source files in your project?

Yes, I included all the necessary files. What else could be wrong?

Make sure that the function or variable is defined in one of the included files. Also, check if the function signature matches between the declaration and definition.

I checked that, and it seems fine. Could it be a project configuration issue?

Yes, it could be. Ensure that your project settings are correctly configured to include the directories where your source files are located.

Thanks! I'll check those settings.