class template user defined obj

hi
Im having problems with class templates and user defined objects
ie:

Code:

---

#include <iostream>
#include <stdlib.h>

using namespace std;

#include "plantpila1.h"
int main()
{
  double arregloDouble[5]={1.1,2.2,3.3,4.4,5.5};
  Pila<double>doublePila(arregloDouble,5);
  doublePila.imprimir();
 
  int arregloInt[3]={1,2,3};
  Pila<int>intPila(arregloInt,3);
  intPila.imprimir();
   
  //user defined object
  Marciano arregloMarciano[3]={Marciano(" marte "),Marciano("  venus "),Marciano(" jupiter ")};
  Pila<Marciano>marcianoPila(arregloMarciano,3);
  marcianoPila.imprimir();
 
  cout << endl;
  system("PAUSE");       
  return 0;
}

//heres the class definition

#ifndef PLANTPILA1_H
#define PLANTPILA1_H

template<class T>
class Pila{
    public:
          Pila(T *,int = 10);//10 is Pila size
                 
          void imprimir();
         
    private:
          T *ptr;
          int tamanioPila;   
};


//member funcions for Pila

//constructor
template<class T>
Pila<T>::Pila(T *arr,int s)
{
    tamanioPila = s > 0? s : 10;
    ptr = arr;
}

//print the array
template <class T>
void Pila<T>::imprimir()
{
    for(int i = 0; i < tamanioPila; i++)
        cout << ptr[i] << ' ';
}

---

ok in the book that im studing says that when you use not native objects(int,float,etc) you need to do that:

template<>
class Pila<Marciano>{
//class body
};


but he dont says where or how i use this . how use this syntaxis?
plase can somebody help me?
i need this template can work with user defines Marciano.

please excuse my poor english
if you need to see Marciano class i can paste it later

Code:

---

//print the array
template <class T>
void Pila<T>::imprimir()
{
    for(int i = 0; i < tamanioPila; i++)
        cout << ptr[i] << ' ';
}

---

Did you overload the insertion operator (<<) in the Marciano class to allow this?

not yet
i know i should do that , but thats not the problem , if you see the post, what i dont understand is the syntaxis

will try to translate what the book says:
"the programmer can take control and create a hinstance of the Pila class of a specific type, like Marcian. know a new class with the name Pila<Marciano> is created
template<>
class Pila<Marciano>{
};

this is part is where and how i dont understand how to us it


or in other words, how the compiler knows how to create a Marciano copy?, the compiler creates a float,int, etc copy of the code but how knows the marciano code?

sorry if i cant explain it clearly but cant find the words in english to exepress that

thanks for your post

I'm not sure I completely understand your question, but I believe this should cover it.

It will look at your templated class, and know how to build it. It just doesn't know what kind of data it will be handling. To figure that out, it takes a look at the Marciano class you made, and makes sure that everything adds up. If it does, you'll be able to create the Pila class of type Marciano.

Like JaWiB pointed out, it won't let you use the imprimir function with the Merciano clasunless you have overloaded the << operator for the it.

ok in other words, i dont have to take care of that because the compiler handle that problem, i just have to overload the << operator.
am i right?
ok i got it,
thanks a lot for the help