Expected specifier-qualifier-list - Why?

I've got an app I'm working on, its got 4 views so far that work fine, I've added another view (with .h & .m files) and now it wont compile. I've copied the code from the other lines but cannot figure out the problem.

the error is on line IBOutlet fifthViewController *fifthViewController;

#import <UIKit/UIKit.h>
@class FirstViewController;
@class SecondViewController;
@class ThirdViewController;
@class ForthViewController;
@class fifthviewcontroller;

@interface MulipleViewsViewController : UIViewController {
    IBOutlet FirstViewController *firstViewController;
    IBOutlet SecondViewController *secondViewController;
    IBOutlet ThirdViewController *thirdViewController;
    IBOutlet ForthViewController *forthViewController;
    IBOutlet fifthViewController *fifthViewController;
}

@property (retain, nonatomic) FirstViewController *firstViewController;
@property (retain, nonatomic) SecondView开发者_Go百科Controller *secondViewController;
@property (retain, nonatomic) ThirdViewController *thirdViewController;
@property (retain, nonatomic) ForthViewController *forthViewController;
@property (retain, nonatomic) fifthviewcontroller *FifthViewController;

-(IBAction) loadSecondView:(id)sender;
-(IBAction) loadThirdView:(id)sender;
-(IBAction) loadFirstView:(id)sender;
-(IBAction) loadForthView:(id)sender;
-(IBAction) loadFifthView:(id)sender;

-(void) clearView;

@end

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I think the problem is here:

@property (retain, nonatomic) fifthviewcontroller *FifthViewController;

it should be:

@property (retain, nonatomic) Fifthviewcontroller *fifthViewController;

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and of course

IBOutlet fifthViewController *fifthViewController;

should be:

IBOutlet FifthViewController *fifthViewController;

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here too:

@class fifthviewcontroller;

should be

@class FifthViewcontroller;

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When you declare the class and property, you use fifthviewcontroller with no capitals, but when you declare the instance variable, you capitalize the V and C: fifthViewController. From the context, it appears that the capitalizations are a mistake and that line should be changed to IBOutlet fifthviewcontroller *fifthViewController;

In the future, when posting about errors, please indicate in the code which line the error occurs on.