double fmod (      double numerator,      double denominator );
      float fmod (       float numerator,       float denominator );
long double fmod ( long double numerator, long double denominator );

<cmath>

Compute remainder of division

Returns the floating-point remainder of numerator/denominator.

The remainder of a division operation is the result of subtracting the integral quotient multiplied per the denominator from the numerator:

remainder = numerator - quotient * denominator

Parameters

x

Floating point value.

Return Value

Portability

Example

/* fmod example */
#include <stdio.h>
#include <math.h>

int main ()
{
  printf ("fmod of 5.3 / 2 is %lf\n", fmod (5.3,2) );
  printf ("fmod of 18.5 / 4.2 is %lf\n", fmod (18.5,4.2) );
  return 0;
}

Output:

fmod of 5.3 / 2 is 1.300000
fmod of 18.5 / 4.2 is 1.700000

See also