Using a templated object in another class

This is a discussion on Using a templated object in another class within the C++ Programming forums, part of the General Programming Boards category; This may sound odd, and I know I've been on this board all night bombarding you poor souls with my ...

  1. #1
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    Jul 2002
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    94

    Using a templated object in another class

    This may sound odd, and I know I've been on this board all night bombarding you poor souls with my stupid questions, but I've got another. I have a class that is template based. It looks like this:

    Code:
    template <int A, int B>
    class CDRAWBLT
    {
    ...
    };
    Now, in another class, I have a member function which takes as a parameter a CDRAWBLT reference. My problem is this: I don't know how to get this to work! I've tried everything I can think of to get this to work! I've tried making that one member function template-based, but that doesn't seem to be working, and I've tried to make the whole class template based, but I don't really want that. I've also tried just leaving out the template list while making my other function. I didn't really expect that to work, and it didn't, but anyways...I'm sorry I keep badgering you all, but you're always so helpful! I'm asking one last time (tonight, at least) for your help. Thanks in advance!

    Brendan
    Draco dormiens nunquam titillandus

  2. #2
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    Guest
    Try this:
    Code:
    template <class A, class B>
    class Tester
    {
    	public:
    	A a;
    	B b;
    	void print()
    	{
    		cout<<a<<","<<b<<endl;
    	}
    	void  set(A x, B y)
    	{
    		a = x;
    		b = y;
    	}
    };
    
    class UseTester {
    public:
    	void UseIt(Tester<int,int>& t)
    	{
    		t.print();
    	}
    };
    
    int main()
    {
         Tester<int,int> t;
         UseTester ut;
    
         t.set(4,5);
         ut.UseIt(t);
    
         return 0;
    }
    In your code, you were making the int a specialization of the template class. Ie. template <int A, int B> class X{...};
    Was this what you wanted? Maybe that was what was causing you problems...

  3. #3
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    94
    Oh thank you so so much! That worked!!! Thank you thank you thank you!!!

    Brendan
    Draco dormiens nunquam titillandus

  4. #4
    Registered User
    Join Date
    Jul 2002
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    94
    And no, int is what I wanted. The point of the template was to size a 2d array. Basically, the CDRAWBLT class holds info on what I call "console bitmaps". Obviously, not every bitmap is the same size, so I couldn't just have something like "array[10][10]". So, templates allowed me to size the array according to each object's needs. See what I'm getting at? Thanks so so much again!

    Brendan
    Draco dormiens nunquam titillandus

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