You can, but again this is just being explicit - the compiler bases promotion decisions on type alone, not whether or not an expression is a constant or a variable.
The one important thing to remember is that promotion of assignment is applied *after* the RHS is evaluated, i.e. float f = 1 / 2; is equivalent to float f = (float)( 1 / 2 ); which is zero, since integer division is used. In that case, it does matter, and either 1.0f / 2, or 1 / 2.0f will give the intended result. On Oct 5, 2010, at 8:32 AM, Shawn Bakhtiar wrote: > > > :*S > > Yes... I see the point. Correct. > > For a constant value this is true, in the instance of x = x + 1 (which I see > where the error was), where x is a float this makes no difference. > > However, for clarity of the OP, x = x + y where y is an int, should be > typecast correctly as x = x + (float)y > > Personally when I am writing code, I always write as x = x + 1.0 for clarity > as well. > > Sorry for not understanding the rebuttal :*) > > >> Subject: Re: Confused about floats >> From: scott_r...@killerbytes.com >> Date: Tue, 5 Oct 2010 09:24:13 -0600 >> CC: cocoa-dev@lists.apple.com >> To: shashan...@hotmail.com >> >> On Oct 5, 2010, at 9:16 AM, Shawn Bakhtiar wrote: >> >>> Did you just call typecasting "*completely* unnecessary and pointless"... >> >> No, I called typecasting an int type to a floating type, in order to add it >> to a floating type, unnecessary and pointless. >> >>> You may be correct in that in Objective-C this may no longer be an issue, >>> as the compiler does your work for you, but that was not an assumption I >>> was making. >> >> It's got nothing to do with Objective-C; C has always taken care of that >> case. What exactly do you think is wrong with x = x + 100 where x is a >> double? >> >> -- >> Scott Ribe >> scott_r...@elevated-dev.com >> http://www.elevated-dev.com/ >> (303) 722-0567 voice >> >> >> >> > > _______________________________________________ > > Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) > > Please do not post admin requests or moderator comments to the list. > Contact the moderators at cocoa-dev-admins(at)lists.apple.com > > Help/Unsubscribe/Update your Subscription: > http://lists.apple.com/mailman/options/cocoa-dev/velocityboy%40rodentia.net > > This email sent to velocity...@rodentia.net > _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
