Thread: initializer list help

HI, im just getting a grasp on initializer lists, and learnt that const should be iniatilized in there, how do i go about doing that.
How do i iniatilize dateofbirth,
i tried birthdate=dateOfbirth, and got a lot of error, so im guessing thats wrong.

Code:

class Brain
{
public:
	Brain(int iq);
	void setIQ(int iq);
};

class String
{
public:
	String(const char* str);
	String(const String& other);
	const String& operator=(const String& other);
	const String& operator=(const char* str);
	~String();
};

class Car {};

class Person
{
public:
	Person(const char* rName, long dateOfBirth, int iq, int rIncome):brain(iq),name(rName)
	{
		income=rIncome;
		
	}

private:
	String name;
	Brain brain;
	const long birthdate;
	Car* pCar;
	double income;
};