C / C++ / MFC

c:\users\zahrina\documents\visual studio 2012\projects\gaschedule\gaschedule\gaschedule.h(6): fatal error C1189: #error :  "include 'stdafx.h' before including this file for PCH"
  main.cpp
c:\users\zahrina\documents\visual studio 2012\projects\gaschedule\gaschedule\gaschedule.h(6): fatal error C1189: #error :  "include 'stdafx.h' before including this file for PCH"
  GaScheduleDoc.cpp
c:\users\zahrina\documents\visual studio 2012\projects\gaschedule\gaschedule\gaschedule.h(6): fatal error C1189: #error :  "include 'stdafx.h' before including this file for PCH"
  GaSchedule.cpp
c:\users\zahrina\documents\visual studio 2012\projects\gaschedule\gaschedule\gaschedule.h(6): fatal error C1189: #error :  "include 'stdafx.h' before including this file for PCH"
  CourseClass.cpp

// GaSchedule.h : main header file for the GaSchedule application
//
#pragma once

#ifndef __AFXWIN_H__
#error "include 'stdafx.h' before including this file for PCH"
#endif

#include "resource.h"       // main symbols


// CGaScheduleApp:
// See GaSchedule.cpp for the implementation of this class
//

class CGaScheduleApp : public CWinApp
{
public:
	CGaScheduleApp();


// Overrides
public:
	virtual BOOL InitInstance();

// Implementation

public:
	afx_msg void OnAppAbout();
	DECLARE_MESSAGE_MAP()
};

extern CGaScheduleApp theApp;

#include <stdio.h>

typedef struct
{
    float Centre[3];
    float Radius;
} Sphere;


Sphere *MakeSphere(float *centre, float *radius);
void PrintSphereDetails(Sphere *s);

int main(int argc, const char * argv[])
{

    float c1[3] = {10.0,20.0,30.0};
    float r1 = 10.0;
    Sphere *s1 = MakeSphere(&c1[0], &r1);
    
    PrintSphereDetails(s1);
    
    return 0;
}

Sphere *MakeSphere(float *centre, float *radius)
{
    
    Sphere s;
    
    s.Centre[0] = *centre++;
    s.Centre[1] = *centre++;
    s.Centre[2] = *centre;
    s.Radius = *radius;
    
    return &s;
}


void PrintSphereDetails(Sphere *s)
{
    
    printf("------------------------------------------------\n");
    printf("Centre: (%6.2f, %6.2f, %6.2f)\n", s->Centre[0], s->Centre[1], s->Centre[2] );
    printf("Radius: %6.2f\n\n", s->Radius);
}