XCODE - Source Code + GUI "Calculator v1.0"

View Controller :

calViewController.h

---

#import <UIKit/UIKit.h>

@interface calViewController : UIViewController
{   /*  Declare variable as private   */
    double currentNumber;   // store current value
    double storeNumber;     // store old value
    char Operator;          // store sign of operator
    bool point;             // condition to floating point
    int pointCount;         // condition to number of floating point
}
// Prototype Function to use
// getCurrentNumber
- (void) getCurrentNumber:(double)number;
- (void) showCurrentNumber;
- (void) showStoreNumber;
/*  Label for Showing number    */
@property (weak, nonatomic) IBOutlet UIButton *bEqualOutlet;
@property (weak, nonatomic) IBOutlet UILabel *labelShow;
/*  Button for all operand and operator */
- (IBAction)b:(id)sender;
@property (weak, nonatomic) IBOutlet UIButton *ac;
- (IBAction)bPlus:(id)sender;
- (IBAction)bMinus:(id)sender;
- (IBAction)bMulti:(id)sender;
- (IBAction)bDivid:(id)sender;
- (IBAction)bClear:(id)sender;
- (IBAction)bPower:(id)sender;
- (IBAction)bEqual:(id)sender;
- (IBAction)bPoint:(id)sender;
@end


---

calViewController.m

---

#import "calViewController.h"

@implementation calViewController
@synthesize ac;
@synthesize bEqualOutlet;
@synthesize labelShow;
/*  Start Function    */
//Function getCurrentNumber
- (void) getCurrentNumber:(double)number{
    if(point == false){
        currentNumber = currentNumber*10 + number;
    }else{
        currentNumber += number/pow(10,++pointCount);
    }
}
//Function getLastStore
- (void) getLastStore{
    if(Operator == '+'){
        storeNumber += currentNumber;
    }else if(Operator == '-'){
        storeNumber -= currentNumber;
    }else if(Operator == '*'){
        storeNumber *= currentNumber;
    }else if(Operator == '/'){
        storeNumber /= currentNumber;
    }else if(Operator == '^'){
        storeNumber = pow(storeNumber,currentNumber);
    }
    currentNumber = 0;
}
//Function showCurrentNumber
- (void) showCurrentNumber{
    self.labelShow.text = [NSString stringWithFormat:@"%g",currentNumber];
}

//Function showStoreNumber
-(void) showStoreNumber{
    self.labelShow.text = [NSString stringWithFormat:@"%g",storeNumber];
}
/*  End Function   */
- (IBAction)b:(id)sender{  // button 0
    double n = [sender tag];
    [self getCurrentNumber:n];
    [self showCurrentNumber];
}
- (IBAction)bPlus:(id)sender{          // button Plus +
    [self getLastStore];
    [self showStoreNumber];
    Operator = '+';
    point = false;
    pointCount = 0;
}
- (IBAction)bMinus:(id)sender{          // button Minus -
    [self getLastStore];
    [self showStoreNumber];
    Operator = '-';
    point = false;
    pointCount = 0;

}
- (IBAction)bMulti:(id)sender{          // button Multi *
    [self getLastStore];
    [self showStoreNumber];
    Operator = '*';
    point = false;
    pointCount = 0;

}
- (IBAction)bDivid:(id)sender{          // button Divid /
    [self getLastStore];
    [self showStoreNumber];
    Operator = '/';
    point = false;
    pointCount = 0;

}
- (IBAction)bClear:(id)sender{          // button Clear AC
    currentNumber = 0;
    storeNumber = 0;
    point = false;
    pointCount = 0;
    Operator = '+';
    [self showStoreNumber];
}
- (IBAction)bPower:(id)sender{          // button Power ^
    [self getLastStore];
    [self showStoreNumber];
    Operator = '^';
    point = false;
    pointCount = 0;

}
- (IBAction)bEqual:(id)sender{          // button Equal =
    [self getLastStore];
    [self showStoreNumber];
    point = true;
    pointCount = 0;
    Operator = '+';
}
- (IBAction)bPoint:(id)sender{          // button Point .
    point = true;
    pointCount = 0;
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Release any cached data, images, etc that aren't in use.
}

#pragma mark - View lifecycle

- (void)viewDidLoad
{
    /*  Constructure */
    currentNumber = 0;
    storeNumber = 0;
    Operator = '+';
    point = false;
    pointCount = 0;
    // Do any additional setup after loading the view, typically from a nib.
}

- (void)viewDidUnload
{
    [self setLabelShow:nil];
    [self setBEqualOutlet:nil];
    [super viewDidUnload];
    // Release any retained subviews of the main view.
    // e.g. self.myOutlet = nil;
}

- (void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];
}

- (void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];
}

- (void)viewWillDisappear:(BOOL)animated
{
    [super viewWillDisappear:animated];
}

- (void)viewDidDisappear:(BOOL)animated
{
    [super viewDidDisappear:animated];
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    // Return YES for supported orientations
    return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}

@end


---