Apple

#ifndef Test_project_globalConstants_h

#define Test_project_globalConstants_h

#define TOPVOTES 16 // number of lines to be discovered in a single Hough pass

#endif

file 2: global.c

#include "globalConstants.h"

#ifndef Test_project_global_c

#define Test_project_global_c

float lowerx[TOPVOTES];

#endif

file 3 : global.h

#import "globalConstants.h"

#ifndef Test_project_global_h

#define Test_project_global_h

extern float lowerx[TOPVOTES];

#endif

file 4: controller.h

#import <Cocoa/Cocoa.h>

@interface controller : NSObject {

}

- (IBAction)imageDrop:(id)sender; // image dropped by user

@end

file 5:

#import "Controller.h"

#import "global.h"

@implementation controller

- (void) awakeFromNib {

return;

}

// Enter here when a user drops an Image into the view

- (IBAction)imageDrop:(id)sender {

// initialise this array for testing.

int i;

for (i=0; i< TOPVOTES; i++) {

lowerx[i]= i;

}

NSImage * inputImage;

if ([sender isKindOfClass:[NSImageView class ]]) {

// get the image dropped in the view

inputImage = [sender image];

// this is a system wide data structure.

lowerx[1]=0; // This array should contain 1,2,3...….. when the program breaks here.

}

@end