iOS objective-C: using modulo on a float to get “inches” from Feet

Question

I am trying to make a simple objective-C height converter. The input is a (float) variable of feet, and I want to convert to (int) feet and (float) inches:

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Answer 1

Even modulo works for float, use :

fmod()

You can use this way too...

float totalHeight = 5.122222;
float myFeet = (int) totalHeight; //returns 5 feet
float myInches = fmodf(totalHeight, myFeet);
NSLog(@"%f",myInches);

Answer 2

As answered earlier, subtracting is the way to go. Just remember to convert the one tenths of feet to inches by multiplying with 12:

float totalHeight = 5.122222;
int myFeet = (int) totalHeight;
float myInches = (totalHeight - myFeet) * 12;

Answer 3

Why don't you use

CGFloat myInches = totalHeight - myFeet;