Subtracting 1 from int

[mikelowe]

in my game, livesInt is how many lives the user has and lives is the label that displays the int. When two images collide, the livesInt is supposed to -1.

I am having trouble doing this. what i have is:

if(CGRectIntersectsRect(image1.frame, image2.frame)) {
		image1.center = CGPointMake(160.0, 20);
                //this is where i need help:
		livesInt = livesInt -1;
		lives.text = [NSString stringWithFormat:@"%i", livesInt];
	}

[smasher]

That looks fine to me, assuming that "livesInt" is declared as an int and not an int pointer (int *). In what way is it not working?

[mikelowe]

It would subtract 4. it works now because it was *livesInt

[WillSDev]

isn't it always better to do int --, rather then int - 1

[smasher]

Originally Posted by WillSDev

isn't it always better to do int --, rather then int - 1

I'd be shocked if they compiled down to different assembly on a modern compiler. But livesInt--; would be shorter and it's harder to mistype; you'll never accidentally do x = y-1 when you meant to do x=x-1.

[justill45]

Originally Posted by WillSDev

isn't it always better to do int --, rather then int - 1

int = int - 1, int --, int -= 1. Not much of a difference except the letters themselves