Equivalent of fmodf in C#?

Question

In ~~C++~~ C: Output: "1610612736"

#include <math.h>
#include <stdio.h>

int main(int argc, char** argv)
{
    printf("%d\n", fmodf(5.6f, 6.4f));
    getchar();
}

In C#: Output: "5.6"

using System;

static class Program
{
    public static void Main(string[] args)
    {
        Console.WriteLine(5.6f % 6.4f);
        Console.Read();
    }
}

Clearly not the same output. Suggestions?

%d is for decimal. If you are using C++ use streams to avoid this kind of problem. — Martin York, Sep 08 '10 at 23:07
btw this is C code, not C++. In C++ one uses ``, `` and `std::fmod`. — Alexandre C., Sep 08 '10 at 23:09
This post shouldn't be tagged as "FMOD", this tag is regarding the cross-platform audio middleware called FMOD, not the floating point modulus function. — Mathew Block, Sep 09 '10 at 00:09
Thanks for editing my post and changing the tab. I wanted to tag it as "fmodf", only this tag does not exist and I don't have enough reputation to create it. — Lazlo, Sep 11 '10 at 17:07

score 5 · Accepted Answer · answered Sep 08 '10 at 23:06

5

Try with printf("%f\n", fmodf(5.6f, 6.4f)) instead.

answered Sep 08 '10 at 23:06

Alexandre C.

55,948
11
128
197

Good, sorry about the fact that it's C and tagged C++, I actually am coding in C# and only used the C version to compare. – Lazlo Sep 08 '10 at 23:51
@Lazlo: So you don't mind if I edit your original post then ;) – Alexandre C. Sep 08 '10 at 23:53

score 0 · Answer 2 · answered Sep 08 '10 at 23:11

0

Correcting the decimal problem with fprintf()

#include <math.h>
#include <stdio.h>
#include <iostream>

int main(int argc, char** argv)
{
    std::cout << fmodf(5.6f, 6.4f) << std::endl;
    getchar();
}

Output 5.6

answered Sep 08 '10 at 23:11

Martin York

257,169
86
333
562

2

Please use and , I'm quite sure the C headers trigger errors (or deprecation warnings at the very least) on most compilers. And please use the overloaded function `std::fmod` instead of C's `fmodf`. – Alexandre C. Sep 08 '10 at 23:15

Equivalent of fmodf in C#?

2 Answers2