How can I fix linker errors in my code?

I'm getting a linker error when I try to compile my C++ project. What should I do?

Linker errors often occur due to missing definitions or unresolved symbols. Can you share the specific error message?

It says 'undefined reference to function_name'. What does that mean?

This usually means that the function is declared but not defined. Check if you have implemented the function or if you need to link against a library.

I think I forgot to include the source file where the function is defined. How do I include it?

You can include the source file in your project settings or add it to your build command. Make sure it's compiled together with your other files.