I have this class with variable configuration parameters. I want to include it in other classes: JugadorHumano
, JugadorIA
, Main
, PartidaClasica
, PartidaMision
.
#pragma once
class Configuracion
{
public:
static int MAX_ATAQUES;
static int DIV_TERRITORIOS;
};
int Configuracion::MAX_ATAQUES = 5;
int Configuracion::DIV_TERRITORIOS = 3;
What I want is to be able to modify or read the values from the other classes. I can't declare a static variable and define it in the declaration. I can't let that variables without definition either because I get "Unresolved External" errors.
1>JugadorIA.obj : error LNK2005: "public: static int Configuracion::MAX_ATAQUES" \
(?MAX_ATAQUES@Configuracion@@2HA) already defined in JugadorHumano.obj
1>JugadorIA.obj : error LNK2005: "public: static int Configuracion::DIV_TERRITORIOS" \
(?DIV_TERRITORIOS@Configuracion@@2HA) already defined in JugadorHumano.obj
1>Main.obj : error LNK2005: "public: static int Configuracion::MAX_ATAQUES" \
(?MAX_ATAQUES@Configuracion@@2HA) already defined in JugadorHumano.obj
1>Main.obj : error LNK2005: "public: static int Configuracion::DIV_TERRITORIOS" \
(?DIV_TERRITORIOS@Configuracion@@2HA) already defined in JugadorHumano.obj
1>PartidaClasica.obj : error LNK2005: "public: static int Configuracion::MAX_ATAQUES" \
(?MAX_ATAQUES@Configuracion@@2HA) already defined in JugadorHumano.obj
1>PartidaClasica.obj : error LNK2005: "public: static int Configuracion::DIV_TERRITORIOS" \
(?DIV_TERRITORIOS@Configuracion@@2HA) already defined in JugadorHumano.obj
1>PartidaMision.obj : error LNK2005: "public: static int Configuracion::MAX_ATAQUES" \
(?MAX_ATAQUES@Configuracion@@2HA) already defined in JugadorHumano.obj
1>PartidaMision.obj : error LNK2005: "public: static int Configuracion::DIV_TERRITORIOS" \
(?DIV_TERRITORIOS@Configuracion@@2HA) already defined in JugadorHumano.obj
1>D:\Leire\My Dropbox\Carpetas compartidas\Compartidos Victor\Practicas POO II\P3\P3M10\Debug\P3M10.exe : fatal error LNK1169: one or more multiply defined symbols found
What should I do to avoid this redefinition I get? I can't figure it out and I can't find a similar problem.
You should write the definitions in the cpp file, otherwise, once you include your header file into more than one C++ file(translation unit), you'll get redefinition errors. And #pragma once operates only within one translation unit. So you need a Configuration.cpp file with the following contents
#include "Configuracion.h"
int Configuracion::MAX_ATAQUES = 5;
int Configuracion::DIV_TERRITORIOS = 3;
Also, if your class contains only static member, you have the option of considering having a namespace instead of a class.