### modf -- Separate Floating-Point Value

Format

>     #include <math.h>
>     double modf(double x, double *intptr);

Language Level: ANSI, POSIX, XPG4
modf breaks down the floating-point value x into fractional and integral parts. The signed fractional portion of x is returned. The integer portion is stored as a double value pointed to by intptr. Both the fractional and integral parts are given the same sign as x.

Return Value
modf returns the signed fractional portion of x.

Example
This example breaks the floating-point number -14.876 into its fractional and integral components.

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

    int main(void)
    {
       double x, y, d;

       x = -14.876;
       y = modf(x, &d);
       printf("x = %lf\n", x);
       printf("Integral part = %lf\n", d);
       printf("Fractional part = %lf\n", y);
       return 0;

       /**************************************
          The output should be:

          x = -14.876000
          Integral part = -14.000000
          Fractional part = -0.876000
       **************************************/
    }

fmod -- Calculate Floating-Point Remainder
frexp -- Separate Floating-Point Value
ldexp -- Multiply by a Power of Two
<math.h>