Sum of two variables in Obj-C

I have two variables from 1 to 100. I have two buttons. I want one button to print the two variables on the screen and I want one button to print the sum of both the variables. How do I do this? My code is:

- (IBAction)addition:(id)se开发者_Python百科nder;
{
    int x = arc4random() %100;
    int y = arc4random() %100;
    [label1 setText: [NSString stringWithFormat:@"%i", x]];
    [label2 setText: [NSString stringWithFormat:@"%i", y]];
}

- (IBAction)answer:(id)sender;
{
    int z;
    z = x+y;
    answer.text = [[NSString alloc] initWithFormat:@"%i", z];
}

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With the way you hace your code configured now, you'd have to declare your int values in your Interface file (".h file"). It'd look something like this pseudocode:

@interface Class {
    int x;
    int y;

    UILabel *label1;
    UILabel *label2;
    UILabel *answer;
}

-(IBAction)...

Then in your .m file, you'd just keep it as-is (just remove the int declarations for x and y) and hook up the functions and the outlets in Interface Builder.

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If you make x and y instance variables of the class in question you should get what you want.

As-is those variables don't exist after the invocation to addition: and the above code doesn't even compile... unless you also happen to have x and y already declared as ivars in the class and the versions in addition: are just shadowing them.

In either case, remove the int from x and y in addition:.

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I guess you might have problem with answer button... But that should also work... but if not then try below code which should definitely work.

Here you should declare x & y variable in .h file. And dont declare in addition button click.

- (IBAction)answer:(id)sender;
{
    int z;
    z = x+y;
    answer.text = [NSString stringWithFormat:@"%i", z];
}

If you are not having this question, then i would suggest you to please specify exact issue that you are facing..

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Assuming your are ensuring label1 and label2 keeps integer values your answer method can be like

- (IBAction)answer:(id)sender;
{
    [answer setText:[NSString stringWithFormat:@"%i",[[label1 text] intValue] + [[label2 text] intValue]]];
}