FLOOR(3M-SVR4)      RISC/os Reference Manual       FLOOR(3M-SVR4)



NAME
     floor, floorf, ceil, ceilf, copysign, fmod, fmodf, fabs,
          fabsf, rint, remainder - floor, ceiling, remainder,
          absolute value functions

SYNOPSIS
     cc [flag ...] file ...  -lm [library ...]

     #include <math.h>

     double floor (double x);

     float floorf (float x);

     double ceil (double x);

     float ceilf (float x);

     double copysign (double x, double y);

     double fmod (double x, double y);

     float fmodf (float x, float y);

     double fabs (double x);

     float fabsf (float x);

     double rint (double x);

     double remainder (double x, double y);

DESCRIPTION
     floor and floorf return the largest integer not greater than
     x.  ceil and ceilf return the smallest integer not less than
     x.

     copysign returns x but with the sign of y.

     fmod and fmodf return the floating point remainder of the
     division of x by y.  More precisely, they return the number
     f with the same sign as x, such that x = iy + f for some
     integer i, and | f| <| y|.

     fabs and fabsf return the absolute value of x, | x|.

     rint returns the nearest integer value to its floating point
     argument x as a double-precision floating point number.  The
     returned value is rounded according to the currently set
     machine rounding mode.  If round-to-nearest (the default
     mode) is set and the difference between the function argu-
     ment and the rounded result is exactly 0.5, then the result



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FLOOR(3M-SVR4)      RISC/os Reference Manual       FLOOR(3M-SVR4)



     will be rounded to the nearest even integer.

     remainder returns the floating point remainder of the divi-
     sion of x by y.  More precisely, it returns the value r = x
     - yn, where n is the integer nearest the exact value x/y.
     Whenever | n - x/y| = 1/2, then n is even.

SEE ALSO
     abs(3C), matherr(3M).

DIAGNOSTICS
     fmod and fmodf return x when y is 0 and set errno to EDOM.
     remainder returns NaN when y is 0 and sets errno to EDOM. In
     both cases, except in compilation modes -Xa or -Xc, a mes-
     sage indicating DOMAIN error is printed on standard error.
     Except under -Xc, these error-handling procedures may be
     changed with the function matherr.






































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