Simple Calculator code for iPhone

- (void)viewDidLoad
{
[super viewDidLoad];
 resultText.text=@"0.0";
 // Do any additional setup after loading the view, typically from a nib.
}


-(IBAction)digitPress:(id)sender{

 currentNo=currentNo*10+[sender tag];
 resultText.text=[NSString stringWithFormat:@"%d",currentNo];

}(IBAction)OperatorPress:(id)sender{

 if(currentOpertaion==0){
 result=currentNo;

}else{

 switch (currentOpertaion) {
 case 1:
 result=result+currentNo;
 break;
 case 2:
 result=result-currentNo;
 break;

 default:
 break;
}
}
currentNo=0;
 resultText.text=[NSString stringWithFormat:@"%d",result];
 if([sender tag]==0)result=0;
 currentOpertaion=[sender tag];

}
-(IBAction)clear:(id)sender{
 resultText.text=@"0.0";
 currentNo=0;
 result=0;
}