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Declarations and Initializations - Programming

Q1:

Which of the following statements should be used to obtain a remainder after dividing 3.14 by 2.1 ?

A rem = 3.14 % 2.1;

B rem = modf(3.14, 2.1);

C rem = fmod(3.14, 2.1);

D Remainder cannot be obtain in floating point division.

ANS:C - rem = fmod(3.14, 2.1);

fmod(x,y) - Calculates x modulo y, the remainder of x/y.
This function is the same as the modulus operator. But fmod() performs floating point divisions. Example: 


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

int main ()
{
  printf ("fmod of 3.14/2.1 is %lf\n", fmod (3.14,2.1) );
  return 0;
}
Output:
fmod of 3.14/2.1 is 1.040000