Well you did erase those two functions from the cpp files, no wonder the linker can't find them
Also, you pasted the function declaration in the header file right under a different function's doxycomment header, you need to update the doxycomment as well
(doxycomments are the ones starting with triple slash, "///", and they're used by doxygen to generate the documentation, as well as VisualStudio to give you tooltip hints on the functions.

Also, you pasted the function declaration in the header file right under a different function's doxycomment header, you need to update the doxycomment as well
(doxycomments are the ones starting with triple slash, "///", and they're used by doxygen to generate the documentation, as well as VisualStudio to give you tooltip hints on the functions.