Question

In the Arduino IDE I am getting an error about how my Constructor is declared twice.

This is the code for it:

tond.h

#ifndef TOND_H
#define TOND_H

class Tondeuse {

public:
  Tondeuse();
  Tondeuse(int,int);

};

#endif

tond.cpp

#ifndef TOND
#define TOND

#include "arduino.h"
#include "tond.h"


Tondeuse::Tondeuse()
{

}

Tondeuse::Tondeuse(int h, int w)
{

Serial.println("Hello");

}



#endif

And the errors:

Tondeuse.cpp.o: In function `Tondeuse':
/tond.cpp:11: multiple definition of `Tondeuse::Tondeuse()'
tond.cpp.o:C:\Users\DEPANNE\AppData\Local      \Temp\build6942484698459603114.tmp/tond.cpp:11: first defined here
Tondeuse.cpp.o: In function `Tondeuse':
/tond.cpp:11: multiple definition of `Tondeuse::Tondeuse()'
tond.cpp.o:C:\Users\DEPANNE\AppData\Local   \Temp\build6942484698459603114.tmp/tond.cpp:11: first defined here
Tondeuse.cpp.o: In function `Tondeuse':
/tond.cpp:16: multiple definition of `Tondeuse::Tondeuse(int, int)'
tond.cpp.o:C:\Users\DEPANNE\AppData\Local\Temp\build6942484698459603114.tmp/tond.cpp:16: first defined here
Tondeuse.cpp.o: In function `Tondeuse':
/tond.cpp:16: multiple definition of `Tondeuse::Tondeuse(int, int)'
tond.cpp.o:C:\Users\DEPANNE\AppData\Local\Temp\build6942484698459603114.tmp/tond.cpp:16: first defined here

I have not included it twice and can’t find anything that is wrong with it.

Answer 1

You include in tond.cpp in Tondeuse.cpp. Don’t include implementation files.

If the file no longer exists (refactoring), make sure you clean the solution before building again.