rashmi agar
58 posts
Mar 16, 2025
9:35 PM
|
I need to calculate the c++ float modulus . I know that for integers, the modulus operator % works fine, but it doesn’t seem to work with float or double.
I found fmod() in , and it seems to work:
cpp
Copy
Edit
#include
#include
int main() {
double a = 5.5;
double b = 2.0;
std::cout << "fmod(5.5, 2.0) = " << fmod(a, b) << std::endl;
return 0;
}
Output:
cpp
Copy
Edit
fmod(5.5, 2.0) = 1.5
I also came across remainder(), which gives a different result:
cpp
Copy
Edit
std::cout << "remainder(5.5, 2.0) = " << remainder(a, b) << std::endl;
Output:
Copy
Edit
remainder(5.5, 2.0) = -0.5
This confused me because fmod() and remainder() don’t behave the same way. Can someone explain the difference between them?
Also, is there any way to implement a custom floating-point modulus function that mimics the integer % behavior?
|
