Unresolved external symbol c++ for inheritance and constructor

Question

//Baseclass.h
class Baseclass {
private:
    uint8_t index;
public:
    Baseclass(uint8_t index);
}

//Baseclass.cpp
#include "Baseclass.h"
Baseclass::Baseclass(uint8_t index) {
    index = index;
};

//Subclass.h
#include "Baseclass.h"
class Subclass : public Baseclass {
public:
    Subclass();
};

//Subclass.cpp
#include "Subclass.h"
#include "Baseclass.h"
Subclass::Subclass() : Baseclass(0) {};

What am I missing? I kept getting LNK2019 Error

Severity Code Description Project File Line Suppression State Error

LNK2019 unresolved external symbol "public: __thiscall Baseclass::Baseclass(unsigned char)" (??Baseclass@@QAE@E@Z) referenced in function "public: __thiscall Subclass::Subclass(void)" (??Subclass@@QAE@XZ)    

Answer 1

It couldn't link Baseclass constructor. Are you sure there are no issues with compiling it? If you copy pasted all of the code you lack semicolon at the end of baseclass.