| re: trying to understand Inheritance, Polymorphism and templates
sapropel wrote:[color=blue]
> ive been trying to understand Inheritance, Polymorphism and templates,
> and so ive tried to make a test using all of those. it is about a base
> class taht receives two params on the template and two derivies
> class's that print those into console or into a file.
>
> template <class T, class S> class Base{
>
> protected:
>
> T t;
> S s;
>
> public:
>
> virtual void Print() = 0;
> };
> //prints to console
> template <class T, class S> class Console : public Base{[/color]
template<class T, class S> class Console : public Base<T,S> {
[color=blue]
>
> public:
>
> explicit Console( const T &t, const S &s ){
>
> this->t = t;
> this->s = s;
> }
> void Print(){
>
> std::cout << this->t << " " << this->s << std::endl;
> }
> };
> //prints to file
> template <class T, class S> class File : public Base{
>
> public:
>
> explicit File( const T &t, const S &s ){
>
> this->t = t;
> this->s = s;
> }
>
> void Print(){
>
> std::ofstream file( "teste.txt", std::ios::out );
> file << this->t << " " << this->s << std::endl;
> }
> };
>
> int main(){
>
> Base <int, int> *b = new Console <int, int>( 2, 4 );
> b->Print();
> delete b;
> return 0;
> }
>
> that doesnt work, case he says that he cannot convert Console<T,S>* to
> Base<T,S>* so i must be doing something wrong.[/color]
Perhaps it has something to do with the way you inherited Console...
[color=blue]
>
> another thing, is there a way to do this but only declaring the
> template in the vase class? instead of declaring in all of them?[/color]
Not sure what you mean.
Victor
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