CodingForums.com - C++ lists

Hello,
I try to work with C++...
How to retrieve the m_Digits list of int, with this hh (and particularly the GetDigits function) for a class of big Integers ?

Code:

class Integer

{

        short m_Sign; // m_Sign<0 <=> this<0

        list<int> m_Digits;



public:

        Integer();

        Integer(int n);

        Integer(const char*);

        Integer(const Integer& n);



        short GetSign() const {return m_Sign;};

        const list<int>& GetDigits() const {return m_Digits;};

        The function to use to retrieve the digits 

        const list<int>& GetDigits() const {return m_Digits;};

        //...

};

Integer abs(const Integer& a);

Integer fact(Integer a);

Integer pgcd(Integer a, Integer b);

Integer ppcm(Integer a, Integer b);

Integer pow(Integer a, int b);

Integer pow(Integer a, Integer b);

// The new function to build 

Integer sqrt(Integer a);

I do not clearly understand the definition of the line

Code:

const list<int>& GetDigits() const {return m_Digits;};

and I am unable to declare a list<int> variable to retrieve this list.

Thanks !