Question

I have a problem, normally I would understand why this is happening, I didnt declare the function in the main method. But the class itself includes the .h file, which has the prototype for this method, so I am a bit lost on why it is not in the scope of the main function.

  using namespace std;
  #include "Solar.h"


int main(){
  initializeGL();
  Stars *Alpha = new Stars(5.0);
  Planets *Awe = new Planets(.6,2,30,"Awe",0.0,0.0,0.0);
  paintGL();
  return 0;
}

void Solar::initializeGL(){

  glShadeModel(GL_SMOOTH);

  glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
  glClearDepth(1.0f);

  glEnable(GL_DEPTH_TEST);
  glDepthFunc(GL_LEQUAL);

  glHint(GL_PERSPECTIV
  ....
 }

There is also a function paintGL() later on, and here is the header file

 class Solar {
 public:
  void initializeGL();
  void resizeGL(int width, int height);
  void paintGL();
  .....
private:
  .....
};

I am not the best with c++, so anyhelp will be appreciated.

ANd here is the error

Solar.cpp:4: error: declaration of âvoid Solar::initializeGL()â outside of class is not definition
Solar.cpp:5: error: declaration of âvoid Solar::paintGL()â outside of class is not definition
Solar.cpp: In function âint main()â:
Solar.cpp:8: error: âinitializeGLâ was not declared in this scope
Solar.cpp:11: error: âpaintGLâ was not declared in this scope

Answer 1

Solar is a class, and initializeGL and paintGL are member functions. If you wanted to use them, you would have to create an instance of Solar.

Solar solar;
solar.initializeGL();
// ...more
solar.paintGL();

Read up on member functions: http://msdn.microsoft.com/en-us/library/fk812w4w.aspx