CODEWITHSUNDEEP
iphonemodulo
HelloMoon
HelloMoon

Reputation:

How to make a modulo operation in objective-c / cocoa touch?

I have two CGFloat values, and want to calculate the modulo result. Or in other words: I want to know what's left if valueA is placed as much as possible into valueB.

So I just tried:

CGFloat moduloResult = valueB % valueA;

the compiler complains about the % and tells me: "invalid operands to binary %". Any idea?

Upvotes: 84

Views: 90630

Answers (2)

mouviciel
mouviciel

Reputation: 67829

% is for int or long, not float or double.

You can use fmod() or fmodf() from <math.h> instead.

Better is <tgmath.h> as suggested by the inventor of CGFloat.

Upvotes: 207

James
James

Reputation: 5820

If I remember correctly modulo requires 2 ints as its input so you'd need something like:

CGFloat moduloResult = (float)((int)valueB % (int)valueA);

Assuming that valueB and valueA are both floats

Upvotes: 12

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