How to use % for float numbers?

Question

I am trying to filter through a float number given by the user and find the largest digit within. However, I keep getting the error:

error: invalid operands to binary % (have 'float' and 'int')

I have read other forums stating us the fmod function, how would I apply that with a simple piece of code that I just want to find the remainder of a float?

Possible duplicate of [Why does modulus division (%) only work with integers?](https://stackoverflow.com/questions/6102948/why-does-modulus-division-only-work-with-integers) — Dov Benyomin Sohacheski, May 29 '17 at 20:51
Floats usually don't have decimal digits, that's an illusion offered by default ways of printing them. Extracting decimal digits from them typically results in a bunch of junk. — harold, May 29 '17 at 20:52
Welcome to Stack Overflow. Please read the [About] and [Ask] pages soon, but even more importantly, please read about how to create an MCVE ([MCVE]). You should include code showing what you've got. Granted, in this case, it isn't compiling, but even a 10 line (or less) example should be provided. — Jonathan Leffler, May 29 '17 at 21:52

score 1 · Answer 1 · edited May 29 '17 at 21:51

1

Use the fmod function (Ideone example):

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

int main(void) {
    float val = 19.3;
    int div = 2;
    printf("%f\n", fmod(val, div));
    return 0;
}

edited May 29 '17 at 21:51

Jonathan Leffler

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answered May 29 '17 at 21:00

aardvarkk

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score 1 · Answer 2 · answered May 29 '17 at 21:03

1

The % operator is only applicable between integer numbers because in order to generate an integer quotient is required an integer division. Use instead:

double remainder = fmod(arg1, arg2);

answered May 29 '17 at 21:03

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How to use % for float numbers?

2 Answers2