modf, modfl

raw OCR

Splits a double or long double into integer and fractional parts.

Defined in header <math.h>

Syntax

#include <math.h>
double modf(double  x, double *ipart);
long double modfl(long double x, long double *ipart);

Portability

	DOS	UNIX	Windows	ANSI C	C++ only
modf	■	■	■	■
modfl	■		■

Remarks

modf breaks the double x into two parts: the integer and the fraction. modf stores the integer in ipart and returns the fraction. modfl is the long double version; it takes long double arguments and returns a long double result.

Return value

modf and modfl return the fractional part of x.

Example

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

int main(void)
{
   double fraction, integer, number = 100000.567;
   fraction = modf(number, &integer);
   printfC'The whole and fractional parts of %lf are %lf and  %lf\n", number,
           integer, fraction);
   return 0;

Differences from modern implementations

Nothing recorded yet.

Modern references

These are search links, not yet checked by hand.

Stable link: /3.1/math.h/modf/ · short form /3.1/modf/