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RINT !!!RINT NAME SYNOPSIS DESCRIPTION RETURN VALUE ERRORS NOTES CONFORMING TO SEE ALSO ---- !!NAME nearbyint, nearbyintf, nearbyintl, rint, rintf, rintl - round to nearest integer !!SYNOPSIS __#include __ ''x''__); float nearbyintf(float__ ''x''__); long double nearbyintl(long double__ ''x''__); double rint(double__ ''x''__); float rintf(float__ ''x''__); long double rintl(long double__ ''x''__); __ !!DESCRIPTION The __nearbyint__ functions round their argument to an integer value in floating point format, using the current rounding direction and without raising the ''inexact'' exception. The __rint__ functions do the same, but will raise the ''inexact'' exception when the result differs in value from the argument. !!RETURN VALUE The rounded integer value. If ''x'' is integral or infinite, ''x'' itself is returned. !!ERRORS No errors other than EDOM and ERANGE can occur. If ''x'' is NaN, then NaN is returned and ''errno'' may be set to EDOM. !!NOTES The SUSv2 and Austin draft contain text about overflow (which might set ''errno'' to ERANGE, or raise an exception). In practice, the result cannot overflow on any current machine, so this error-handling stuff is just nonsense. (More precisely, overflow can happen only when the maximum value of the exponent is smaller than the number of mantissa bits. For the IEEE-754 standard 32-bit and 64-bit floating point numbers the maximum value of the exponent is 128 (resp. 1024), and the number of mantissa bits is 24 (resp. 53).) !!CONFORMING TO The __rint()__ function conforms to BSD 4.3. The other functions are from C99. !!SEE ALSO ceil(3), floor(3), lrint(3), nearbyint(3), round(3), trunc(3) ----
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