how to calculate the float reminder for the two float values

Question

I have two float values, 'a' and 'b' .

I need to calculate the reminder of these two float values, and it must be a float value.

Let

float a = 1.1;
float b = 0.5;

So the remainder 'r' should be accurate value

i.e. r = a % b

r = 1.1 % 0.5

  0.5) 1.1 (2
       1.0
     ______

       0.1

  r = 0.1

But it causes to an error invalid operand for float values.

How to do it?

Answer 1

In C , C++ and Objective-C that would be fmod.

Answer 2

use fmod()

#include <math.h>
double x,y,z;
x = 1.1;
y = 0.5;
z = fmod(x,y)

Don't tforget the -lm liker flag if you are on linux/unix/mac-osx/.

for more info

$man fmod