Check if a double is evenly divisible by another double in C?

Question

How can I check if a double x is evenly divisible by another double y in C? With integers I would just use modulo, but what would be the correct/best way to do it with doubl

Answer 1

How can I check if a double x is evenly dividable by another double y in C? With integers I would just use modulo, but what would be the correct/best way to do it with doubles?

You would include and link to the math library:

#include

Then you would call the floating point modulus function fmod:

if (fmod(5.0, 2.5) == 0.0)
  // evenly divisible
else
  // not evenly divisible

You may want to compare the result of fmod with a small value instead of 0.0 depending on your needs.