Undefined reference to main (C++)

[spacesearcher]

I'm trying to write a program in c++ everything was going fine then Eclipse gives me the error that I have an undefined reference to main. I can't figure out why its breaking. here is the error message and my source:

Error message:

Severity and Description Path Resource Location Creation Time Id
/build/buildd/glibc-2.9/csu/../sysdeps/i386/elf/start.S undefined reference to `main' n-queenserrorchecking line 115 1256433944392 266



nqueens.cpp :

#include <cstdlib>
#include <iostream>
#include <stack>
#include "Point.h"
#include <cmath>

using namespace std;
namespace macs262_labs{


int main()
{



return 0;
}

} // end namespace





#ifndef POINT_H_
#define POINT_H_

//a point class
#include <cstdlib>

using namespace std;
namespace macs262_labs{
class Point{
public:
Point(void);
Point( int xpoint, int ypoint): x(xpoint), y(ypoint) {}

int getx() const { return x; }
int gety() const { return y; }

void setx( int xpoint ) { x=xpoint; }
void sety( int ypoint ) { y=ypoint; }

private:
int x;
int y;
};


} // end namespace
#endif /*POINT_H_*/




This is the first time I have had this error and I have written more complicated programs. But this one is stumping me. Anyone have any ideas?

[dwhitney67]

Wow, there is definitely a first for everything. Why in pray tell do you have the main() function declared/implemented in a namespace?

P.S. A couple of pointers... 1) do not use the "using namespace" directive in a header file; 2) include your local header file(s) (eg. Point.h) before you include system header file(s).

[kavon89]

I'd guess it's because you're defining main in a namespace, or you're trying to make two main functions. I'm not very experienced in C++ though.