floor
and floorf
find 
x
the nearest integer less than or equal to x.
ceil
and ceilf
find 
x
, the nearest integer greater than or equal to x.
floor,
floorf,
ceil,
ceilf
[floor and ceiling]
SYNOPSIS
#include <math.h>
double floor(double x);
float floorf(float x);
double ceil(double x);
float ceilf(float x);
DESCRIPTION
floor
and floorf
find x
the nearest integer less than or equal to x.
ceil
and ceilf
find x
, the nearest integer greater than or equal to x.
RETURNS
floor
and ceil
return the integer result as a double.
floorf
and ceilf
return the integer result as a float.
COMPLIANCE
floor
and ceil
are ANSI. floorf
and ceilf
are extensions.