adding total sum with floating points - ios

Question

In xcode I am utilizing 4 utitextfields for the following chart that the user will enter a whole number, chart is the following:
Total | Win | Place | Show
34 | 4 | 5 | 3
My algorithm for this chart is the following:
-For total win * 1
-For total place * .5
-For total Show * .25
-Add the three totals into a new Float value (identified as,
float totalTrackAllTogether)
-Divide totalTrackAllTogether by the total column (identified as,
int trackTotalColum)
-Display the sum on onOffLabel.text
Here is the code portion that does not seem to work and crashes
-(void)trackRecordMath
{
int trackWinColum = [trackWin.text intValue];
int trackPlaceColum = [trackPlace.text floatValue];
int trackShowColum = [trackShow.text floatValue];
int trackTotalColum= [trackTotal.text intValue];
int trackWinTotal = trackWinColum * 1;
NSLog(#"%d", trackWinTotal);
int trackPlaceTotal = trackPlaceColum *.5;
NSLog(#"%d", trackPlaceTotal);
int trackShowTotal= trackShowColum *.25;
NSLog(#"%d", trackShowTotal);
float totalOfTrackColums = trackWinTotal + trackPlaceTotal + trackShowTotal;
float totalTrackAllTogether= (float) totalOfTrackColums / trackTotalColum;
onOffLabel.text = [[NSString alloc] initWithFormat:#"%f", totalTrackAllTogether];
}
I seem to be held up when trying to multiply floating points with whole numbers, and displaying it through onOffLabel.text. Thank you for the help!

Answer 1

These is basic stuff which works the same in C, C++ and Objective-C. If you do a floating-point calculation and store the result in an int, everything after the decimal point is dropped.
Furthermore, by using float instead of double you get massive rounding errors without any benefit. Instead of
int trackPlaceColum = [trackPlace.text floatValue];
write own of these:
NSInteger trackPlaceColumn = [trackPlace.text integerValue];
double trackPlaceColumn = [trackPlace.text doubleValue];
BTW. It's a column, not a colum. And you will get a crash if you divide by zero. So check whether trackTotalColumn is zero or not in your code.