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frexp

Usage

   #include <math.h>
   double frexp(double value,int *eptr);

   ANSI

Description

   Splits the double value into x and e such that (value == x*(2e) and x >
   .5 and x <= 1.0). e is stored in *eptr and x is returned. If value is
   0.0, then both x and e are 0.

Example 

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


   int main()
   {
       double d1, d2;
       int i;
       d2 = 15.3;
       d1 = frexp(d2, &i);
       printf("d1 = %f si = %d\n",d1,i);
       return EXIT_SUCCESS;
   }

Return Value

   frexp returns the mantissa x.

See Also

   ldexp, modf