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;
};

The same way you did brain and name:

Code:

Person(const char* rName, long dateOfBirth, int iq, int rIncome)
: brain(iq),name(rName), birthdate(dateOfBirth)

thanks, but brain and name were objects and had constructors, how does this workout?

const objects can be assigned to only through their constructors (or similar syntax if you're not using objects.)

ie:
Object o;
const Object p = o; //this is legal because C++ considers o an argument of the p constructor
const Object q; //this cannot be assigned to
const Object r(p); //this is also legal

Code:

class Base {
public:
  const Object o;
  Base();
  Base(const Object& opt) : o(opt) {
    //the above is legal since opt is assigned to o using its constructor
    o = opt; //the object is already constructed, so this is illegal
    //even if you don't explicitly use the initializer list
  } 
};

//edit: the same goes for non-objects like int's and doubles

so that means when in a class i do this

Code:

class X
{
   public:
    some constructor(values)
{ 
}

private:
const int test;
}

I can initialize it in the initializer list as test(whatever) ??? It was not a const object, but a member variable