CC78K4 Datasheet, PDF (251/523 Pages) NEC – CC78K4 Ver.2.30 or Later, C Compiler Language

CHAPTER 10 LIBRARY FUNCTIONS
7-19 ceil
Mathematical Function
FUNCTION
ceil finds the minimum integer no less than x.
HEADER
math.h
FUNCTION PROTOTYPE
double ceil (double x);
Function
ceil
Arguments
x ... Numeric value to perform
operation
Return Value
Normal ... The minimum
integer no less than x
When x is non-numeric or x =
±∞ ... NaN
When x = –0 ... +0
When the minimum integer no
less than x cannot be
expressed ... x
EXPLANATION
• Finds the minimum integer no less than x.
• If x is non-numeric, NaN is returned.
• If x is –0, +0 is returned.
• If x is infinite, NaN is returned and EDOM is set to errno.
• If the minimum integer no less than x cannot be expressed, x is returned.
User’s Manual U15556EJ1V0UM
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