Making Calculator For iPhone!!

- create a window based project

- open interface builder and create a view name it Untitled.xib

- create UIViewControllerSubclass with implementation file.

- give the name of the file untitled

- interface and implementation file will be created.

- open your AppDelegate.h file

- type the code bellow….

Name your xib file as Untitled.xib

- Set the File's Owner class

- add two text Field, a level, and four button for add, subtract, multiply, division.

- select and right click on file owner and connect the reference with the view.

//

//  EtcProjectAppDelegate.h

//  EtcProject

//

//  Created by JUBAYER Ahmed on 3/28/11.

//  Copyright CODEMAGNETS 2011. All rights reserved.

//

#import <UIKit/UIKit.h>

@class untitled;

@interface EtcProjectAppDelegate : NSObject <UIApplicationDelegate> {

    UIWindow *window;

untitled *viewController;

}

@property (nonatomic, retain) IBOutlet UIWindow *window;

@property (nonatomic, retain) IBOutlet untitled *viewController;

@end

//

//  EtcProjectAppDelegate.m

//  EtcProject

//

//  Created by JUBAYER Ahmed on 3/28/11.

//  Copyright CODEMAGNETS 2011. All rights reserved.

//

#import "EtcProjectAppDelegate.h"

#import "untitled.h"

@implementation EtcProjectAppDelegate

@synthesize window;

@synthesize viewController;

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    

untitled *viewController = [[untitled alloc] initWithNibName:@"Untitled" bundle:[NSBundle mainBundle]];

[window addSubview:[viewController view]];

// Override point for customization after app launch    

    //[window addSubview:viewController.view];

    [window makeKeyAndVisible];

return YES;

}

- (void)dealloc {

[viewController release];

    [window release];

    [super dealloc];

}

@end

//

//  untitled.h

//  EtcProject

//

//  Created by JUBAYER Ahmed on 3/28/11.

//  Copyright 2011 CODEMAGNETS. All rights reserved.

//

#import <UIKit/UIKit.h>

@interface untitled : UIViewController {

IBOutlet UITextField *textField1;

IBOutlet UITextField *textField2;

    IBOutlet UILabel *label;

}

-(IBAction) Addition;

-(IBAction) SubTrac;

-(IBAction) Multi;

-(IBAction) Divi;

@end

    //

//  untitled.m

//  EtcProject

//

//  Created by JUBAYER Ahmed on 3/28/11.

//  Copyright 2011 CODEMAGNETS. All rights reserved.

//

#import "untitled.h"

@implementation untitled

-(IBAction) Addition{

float number1 = [textField1.text floatValue];

float number2 = number1 + ([textField2.text floatValue]);

label.text = [[NSString alloc] initWithFormat:@"%.2f", number2];

}

-(IBAction) SubTrac{

    float number1 = [textField1.text floatValue];

float number2 = number1 - ([textField2.text floatValue]);

label.text = [[NSString alloc] initWithFormat:@"%f", number2];

}

-(IBAction) Multi{

float number1 = [textField1.text floatValue];

    float number2 = number1 * ([textField2.text floatValue]);

label.text = [[NSString alloc] initWithFormat:@"%f",number2];

}

-(IBAction) Divi{

float number1 = [textField1.text floatValue];

float number2 = number1 / ([textField2.text floatValue]);

label.text = [[NSString alloc] initWithFormat:@"%f",number2]; 

}

- (void)didReceiveMemoryWarning {

    // Releases the view if it doesn't have a superview.

    [super didReceiveMemoryWarning];

    

    // Release any cached data, images, etc that aren't in use.

}

- (void)viewDidUnload {

    [super viewDidUnload];

    // Release any retained subviews of the main view.

    // e.g. self.myOutlet = nil;

}

- (void)dealloc {

    [super dealloc];

}

@end