Calculates the minimum integer value greater than x and x
long double __far ceill(long double x); (C99)
Returns the minimum integer greater than x and x.
If x is ±∞, ceill returns ±∞ and sets macro ERANGE to global variable errno.
If x is a Not-a-Number(NaN), ceill returns a Not-a-Number (NaN) and sets macro EDOM to global variable errno.
This function calculates the minimum integer value greater than x and x.