Answer 1

Your Mom ,
https://code.sololearn.com/co10F7fK0cZU/?ref=app

Answer 2

Your Mom
https://code.sololearn.com/cLR5A07Mfxb6/?ref=app

Answer 3

Your Mom , modulo operation can be applied only for integers.

Answer 4

You can't use the modulo with a floating point number.

Answer 5

Your Mom , yes cast it to integer =>(int) a %(int) b;

Answer 6

Your Mom , look at the code.
https://code.sololearn.com/cNihJpIjQgtw/?ref=app

Answer 7

use "fmod()" from the math.h / cmath header file .