Invalid use of template-name 'BigNumber' without and argument list

[yhl1024]

Hi I keep having this error message for the part "BigNumber B1,B2,RES;" where at the button, can any1 help me out please, here is the code. I tried adding to the class, but none of them worked, I know t his might be simple for alot of guys here,but I just starting to do c++, I am still trying to get the hang of it, so please help, many thanks.


template <class T>

class BigNumber {
private:
struct Node {
T data;
Node *next;
};
Node *front, *current;

public:
BigNumber();
~BigNumber();
void ReadFromString (string decstring );
void PrintBigNumber ();
void AddBigNumbers(BigNumber B1,BigNumber B2);
};

template <class T>
BigNumber<T>::BigNumber(){
front = NULL;
current = NULL;
}

template <class T>
BigNumber<T>::~BigNumber(){
}


BigNumber B1,B2,RES;

}

[Zhuge]

BigNumber is a template class; you need to specify what you want the type "T" to stand for when you make objects of that type.
http://www.cplusplus.com/doc/tutorial/templates/#class_templates

I am somewhat confused on the purpose of the AddBigNumbers() method though; it takes two parameters, presumably the two numbers to add, but that leaves me wondering what the object calling it is meant to be used for.