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Help, heritage, polymorphism or parametric

May 5, 2015 at 10:32pm
pertenezcoaselg (3)
Well, i'm a beginner in c++, my teacher told us to make a class node and other class dipole, but there's a error or something, i don't know

And in the console is "undefined reference dipole<int>::dipole" or something like that

PS: sorry if i said something wrong i'm so bad talking english xD. So the codes is in spanish

node.h
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#ifndef NODO_H
#define NODO_H

template <class T>
class Nodos
{
	private:
		T dato;
		Nodos<T> *sig;
		Nodos<T> *ant;

	public:
		Nodos(); //Constructor
		Nodos<T>* ver_siguiente();
		Nodos<T>* ver_anterior();
		T ver_dato();
		T asignar_dato (T);
		Nodos<T>* next (Nodos<T>*);
		Nodos<T>* before (Nodos<T>*);
		~Nodos(){} //Destructor
};

#endif



node.cpp
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#include<iostream>
#include<nodoG.h>

template <class T>
Nodos<T>::Nodos()
{
	this->sig=0;
	this->ant=0;
	this->dato=0;
}

template <class T>
Nodos<T>* Nodos<T>::ver_siguiente()
{
	return(this->sig);
}

template <class T>
Nodos<T>* Nodos<T>::ver_anterior()
{
	return(this->ant);
}

template <class T>
T Nodos<T>::ver_dato()
{
	return(this->dato);
}

template <class T>
T Nodos<T>::asignar_dato (T flot)
{
	return (this->dato=flot);
}

template <class T>
Nodos<T>* Nodos<T>::next(Nodos* smt)
{
	this->sig=smt;
}

template <class T>
Nodos<T>* Nodos<T>::before(Nodos* smt)
{
	this->ant=smt;
}


dipole.h
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#ifndef DIPOLO_H
#define DIPOLO_H
#include<nodoG.h>

template <class T>
class dipol : public Nodos<T>
{
	private:
		Nodos<T>* inicio;
		Nodos<T>* fin;
		int tope;

	public:
		dipol();
		T ver_inicio();
		T ver_fin();
		void agregar_inicio(T);
		void agregar_fin(T);
		int sacar_inicio();
		int sacar_fin();
		int ver_tope();

};

#endif


dipole.cpp
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#include<iostream>
#include<dipoloG.h>
#include<nodoG.h>


template <class T>
dipol<T> ::dipol()
{
	this->inicio=0;
	this->fin=0;
	this->tope=0;
}

template <class T>
T dipol<T>::ver_inicio()
{
	return(this->inicio->ver_dato());
}
template <class T>
T dipol<T>::ver_fin()
{
	return(this->fin->ver_dato());
}

template <class T>
void dipol<T>::agregar_inicio(T dato)
{
	Nodos<T>* dat= new Nodos<T>;

	dat->asignar_dato(dato);
	dat->next(this->inicio);
	this->inicio=dat;

	if(this->tope==0)
		this->fin=this->inicio;
	this-> tope= this->tope+1;
}
template <class T>
void dipol<T>::agregar_fin(T dato)
{
	Nodos<T>* dat= new Nodos<T>;

	dat->asignar_dato(dato);
	dat->before(this->fin);
	this->fin=dat;

	if(this->tope==0)
		this->inicio=this->fin;

	this-> tope= this->tope+1;
}

template <class T>
int dipol<T>::sacar_inicio()
{
	if(this->tope>2)
	{
		Nodos<T>* aux= this->inicio;
		this->inicio=aux->ver_siguiente();
		this->tope=tope-1;
	}
	else if(this->tope==2)
	{
		this->inicio=this->fin;
		this->tope=tope-1;
	}
	else if(this->tope==1)
	{
		this->inicio=this->fin=0;
		this->tope=tope-1;
	}
	else
		return 1;
}

template <class T>
int dipol<T>::sacar_fin()
{
	if(this->tope>2)
	{
		Nodos<T>* aux= this->fin;
		this->fin=aux->ver_anterior();
		this->tope=tope-1;

	}
	else if(this->tope==2)
	{
		this->fin=this->inicio;
		this->tope=tope-1;
	}
	else if(this->tope==1)
	{
		this->inicio=this->fin=0;
		this->tope=tope-1;
	}
	else
		return 1;
}

template <class T>
int dipol<T>::ver_tope()
{
	return(this->tope);
}


main
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#include<iostream>
#include<dipoloG.h>
//#include<nodoG.h>
#include<unistd.h>

int main()
{
	int datosi[20];
	dipol <int> ent;//here is the problem
	return 0;
}
Edit & run on cpp.sh



Thank you.
Last edited on May 5, 2015 at 10:33pm
May 5, 2015 at 10:45pm
firedraco (6245)
For future reference, please post the entire error message.

Your problem is that you can't split template definitions up into different files like you have there; all of the member function definitions must be in the header file instead of in a separate cpp file.
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