How to seperate definition and implementation of a derived class constructor?

Question

I would like to learn how to define a derived class constructor in one file so that I could implement it in another file.

public:
Derived(std::string name) : Base(name);
~Derived();

Destructor works as expected, however with constructor I either add {} at the end (instead of a semicolon) and then get redefinition of 'Derived' error or I get asked to add {} instead of a semicolon. What is a way to separate definition and implementation in this case?

Answer 1

Base.h

#include <string>

class Base
{
protected:
    std::string name;
    ...
public:
    Base(std::string name);
    virtual ~Derived();
    ...
};

Base.cpp

#include "Base.h"

Base::Base(std::string name)
    : name(name)
{
    ...
}

Base::~Base()
{
    ...
}

Derived.h

#include "Base.h"

class Derived : public Base {
    ...
public:
    Derived(std::string name);
    ~Derived();
    ...
};

Derived.cpp

#include "Derived.h"

Derived::Derived(std::string name)
    : Base(name)
{
    ...
}

Derived::~Derived()
{
    ...
}