I have a file main.cpp
#include <iostream>
#include "Cc.h"
int main ()
{
abc::Cc objc; //namespace abc
objc.function();
std::cout<<"hello world"<<std::endl;
return 0;
}
File Cc.h has :
//definition of function() is in Cc.cpp
#pragma once
#include "B.h"
namespace abc
{
xyz::B obj; //namespace xyz
class Cc
{
public:
Cc(void);
void function();
~Cc(void);
};
}
//definition of function() is here in Cc.h
#if 0
namespace abc
{
xyz::B obj;
class Cc
{
public:
Cc(void) {}
void function() {
obj.functionb();
std::cout<<"inside the function of class cc"<<std::endl;}
~Cc(void) {}
};
#endif
File B.h has :
//definition of functionb() is in B.cpp
#pragma once
#include <iostream>
namespace xyz
{
class B
{
public:
B(void);
void functionb();
virtual ~B(void);
};
}
B.cpp has
#include "B.h"
namespace xyz
{
B::B(void)
{
}
void B::functionb()
{
std::cout<<"inside the function of class B"<<std::endl;
}
B::~B(void)
{
}
}
If the definition for function() is there in "Cc.h" then the code runs fine. But if the function definition is in Cc.cpp, it gives error
main.obj : error LNK2005: "class xyz::B abc::obj" (?obj@abc@@3VB@xyz@@A) already defined in Cc.obj C:\Users\20033172\Documents\Visual Studio 2010\Projects\namespaceTest\Debug\namespaceTest.exe : fatal error LNK1169: one or more multiply defined symbols found
Can anyone tell how is this Linking process happening? Any help is appreciated.
