error LNK2019: unresolved external symbol "public: __thiscall selsort::~selsort(void)" (??1selsort@@QAE@XZ) referenced in function __unwindfunclet$??0sorting@@QAE@XZ$0 C:\Users\user\Documents\Visual Studio 2010\Projects\Sorting Algos\Sorting Algos\mymain.obj
i hv a class named linkedlist, subclass selsort, and sub-sub class sorting.
can anyone please tell what does this error means??? and how can i resolve it??