What is wrong with this code?

Question

So i tryed to reproduce the composition tutorial in codeblocks and i wrote the code just like it was in the tutorial just in separate files. And codeblocks gives out like 11 errors and i cant find out how to fix them on my own.

/////Geburtstag.h/////
#ifndef GEBURTSTAG_H
#define GEBURTSTAG_H

class Geburtstag
{
public:
Geburtstag();
void DatumAusgabe();

protected:

private:
int Tag;
int Monat;
int Jahr;
};

#endif // GEBURTSTAG_H

/////Geburtstag.cpp/////
#include "Geburtstag.h"

Geburtstag::Geburtstag(int d,int m, int y){:Tag(d),Monat(m),Jahr(y)}
Geburtstag::DatumAusgabe(){
cout<<Tag<<"/"<<Monat<<"/"<<Jahr<<"/"<<endl;}

/////Person.h//////
#ifndef PERSON_H
#define PERSON_H

class Person
{
private:
string Name;
public:
Person();

void NameAusgabe();

protected:

};

#endif // PERSON_H
/////Person.cpp/////
#include "Person.h"

Person::Person(string n):Name(n)
Person::NameAusgabe(){
cout<<Name<<endl;
}
{
//ctor
}

Answer 1

This compiles:
https://code.sololearn.com/cYgY72SJ8nr5

Answer 2

Additionaly to what @rafal mentioned, I saw a few more mistakes:
1. If you use functions from the STL in a file and dont use "using namespace std;", you'll have to write std:: in front of all functions from the STL, e.g. std::cout and std::endl.
2. Similar to 1., if you use functions from a library, make sure to add that library to your file using #include, e.g. <iostream> in Geburtstag.cpp for std::cout.
3. Maybe a typing mistake, but in your ctor you put the initialization list into the curly braces, which is wrong - it comes before them.
4. When defining a function in a cpp.file, dont forget the return type of the function!
5. Also I dont know why you declared Geburtstag::NameAusgabe() {} inbetween your Person constructor, but currently it is a mistake.

Thats everything for now from my point of view, cant find any more.

Answer 3

in both of your .cpp files constructors have arguments, but in .h there is none, also use destructors