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Undefined reference to 'Class::Function()'

aeca97 (3)
Hello, friends. I have a problem with this code.
I'm noob in C++, it's for that I've some doubts about this.

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#ifndef CONTACTO_H
#define CONTACTO_H
#include <iostream>
#include <string>

using namespace std;

class Contacto
{
    public:
        Contacto();
        Contacto(string,string,long);
        string Getnombre() { return nombre; }
        void Setnombre(string val) { nombre = val; }
        string Getcorreo() { return correo; }
        void Setcorreo(string val) { correo = val; }
        long Gettelefono() { return telefono; }
        void Settelefono(long val) { telefono = val; }
        void Imprimir();
    protected:

    private:
        string nombre;
        string correo;
        long telefono;
};

#endif // CONTACTO_H 


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#include "Contacto.h"

Contacto::Contacto(string nombre, string correo = 0, long telefono = 0)
{
    Setnombre(nombre);
    Setcorreo(correo);
    Settelefono(telefono);
}


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#include <iostream>
#include "Contacto.h"

using namespace std;

int main()
{
    string nombre, correo;
    long telefono;
    int elementos = 2;
    Contacto *matDin = new Contacto[elementos];



    delete []matDin;
    return 0;
}[/output]


What is the error in the code? I need to create a dyanmic array of Contacto.
Last edited on
Chervil (7320)
What is the error in the code?

The error is: 
undefined reference to `Contacto::Contacto()'



The class Contacto has two constructors,
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    Contacto();
    Contacto(string,string,long);


When this line is executed,
 
 
    Contacto *matDin = new Contacto[elementos];

the default constructor is called for each of the Contacto objects created in the array.

Where is the code for the default constructor?

You could code it like this:
 
 
Contacto::Contacto() : telefono(0) { }


aeca97 (3)
But if I put the mail and the phone like default, how should I do?
Chervil (7320)
Default value of std::string is just an empty string "". If you want some other default value, you need to specify it.
aeca97 (3)
Okay, man. Thank you for your answer!
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