iOS first App - Temperature conversion

convertToCelsius.m

-(IBAction) convertToCelsius:(id)sender
{
    int f=[self.fahrenheit.text intValue];
    int c=[self faren2celsius:f];
    self.celsius.text=[NSString stringWithFormat:@"%d",c];
}

faren2celsius.m

-(float)faren2celsius:(int) faren
{
    return (faren-32)/1.8;
}

TempViewController.h

#import <UIKit/UIKit.h>

@interface TempViewController : UIViewController
    @property(weak,nonatomic) IBOutlet UITextField* fahrenheit;
    @property(weak,nonatomic) IBOutlet UILabel* celsius;
    -(IBAction) convertToCelsius:(id)sender;
@end