Category Archive for "Undefined Reference"

What is an undefined reference/unresolved external symbol error and how do I fix it?

When working with C++ programming, you may encounter an error message that says "undefined reference" or "unresolved external symbol". These are linker errors that us...

Why can templates only be implemented in the header file?

Templates in C++ are a powerful feature that allows for the creation of reusable code. However, there is a restriction that templates can only be implemented...