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Diffstat (limited to 'manual/math.texi')
| -rw-r--r-- | manual/math.texi | 54 |
1 files changed, 27 insertions, 27 deletions
diff --git a/manual/math.texi b/manual/math.texi index 7de6d16..870edd5 100644 --- a/manual/math.texi +++ b/manual/math.texi @@ -71,12 +71,12 @@ domain or range errors. In particular, this means that you won't see Handling}, for more information about signals.) @comment math.h -@comment ANSI +@comment ISO @deftypevr Macro double HUGE_VAL An expression representing a particular very large number. On machines -that use @w{IEEE 754} floating point format, the value is ``infinity''. -On other machines, it's typically the largest positive number that can -be represented. +that use @w{IEEE 754}/@w{IEEE 854} floating point format, the value is +``infinity''. On other machines, it's typically the largest positive +number that can be represented. The value of this macro is used as the return value from various mathematical @code{double} returning functions in overflow situations. @@ -132,21 +132,21 @@ You can also compute the value of pi with the expression @code{acos @comment math.h -@comment ANSI +@comment ISO @deftypefun double sin (double @var{x}) This function returns the sine of @var{x}, where @var{x} is given in radians. The return value is in the range @code{-1} to @code{1}. @end deftypefun @comment math.h -@comment ANSI +@comment ISO @deftypefun double cos (double @var{x}) This function returns the cosine of @var{x}, where @var{x} is given in radians. The return value is in the range @code{-1} to @code{1}. @end deftypefun @comment math.h -@comment ANSI +@comment ISO @deftypefun double tan (double @var{x}) This function returns the tangent of @var{x}, where @var{x} is given in radians. @@ -172,7 +172,7 @@ which are the inverses of the sine, cosine and tangent functions, respectively. @comment math.h -@comment ANSI +@comment ISO @deftypefun double asin (double @var{x}) This function computes the arc sine of @var{x}---that is, the value whose sine is @var{x}. The value is in units of radians. Mathematically, @@ -185,7 +185,7 @@ over the domain @code{-1} to @code{1}. @end deftypefun @comment math.h -@comment ANSI +@comment ISO @deftypefun double acos (double @var{x}) This function computes the arc cosine of @var{x}---that is, the value whose cosine is @var{x}. The value is in units of radians. @@ -199,7 +199,7 @@ over the domain @code{-1} to @code{1}. @comment math.h -@comment ANSI +@comment ISO @deftypefun double atan (double @var{x}) This function computes the arc tangent of @var{x}---that is, the value whose tangent is @var{x}. The value is in units of radians. @@ -209,7 +209,7 @@ returned is the one between @code{-pi/2} and @code{pi/2} @end deftypefun @comment math.h -@comment ANSI +@comment ISO @deftypefun double atan2 (double @var{y}, double @var{x}) This is the two argument arc tangent function. It is similar to computing the arc tangent of @var{y}/@var{x}, except that the signs of both arguments @@ -237,7 +237,7 @@ case. @cindex logarithm functions @comment math.h -@comment ANSI +@comment ISO @deftypefun double exp (double @var{x}) The @code{exp} function returns the value of e (the base of natural logarithms) raised to power @var{x}. @@ -247,7 +247,7 @@ magnitude of the result is too large to be representable. @end deftypefun @comment math.h -@comment ANSI +@comment ISO @deftypefun double log (double @var{x}) This function returns the natural logarithm of @var{x}. @code{exp (log (@var{x}))} equals @var{x}, exactly in mathematics and approximately in @@ -266,7 +266,7 @@ The argument is zero. The log of zero is not defined. @end deftypefun @comment math.h -@comment ANSI +@comment ISO @deftypefun double log10 (double @var{x}) This function returns the base-10 logarithm of @var{x}. Except for the different base, it is similar to the @code{log} function. In fact, @@ -274,7 +274,7 @@ different base, it is similar to the @code{log} function. In fact, @end deftypefun @comment math.h -@comment ANSI +@comment ISO @deftypefun double pow (double @var{base}, double @var{power}) This is a general exponentiation function, returning @var{base} raised to @var{power}. @@ -294,7 +294,7 @@ An underflow or overflow condition was detected in the result. @cindex square root function @comment math.h -@comment ANSI +@comment ISO @deftypefun double sqrt (double @var{x}) This function returns the nonnegative square root of @var{x}. @@ -346,7 +346,7 @@ The functions in this section are related to the exponential functions; see @ref{Exponents and Logarithms}. @comment math.h -@comment ANSI +@comment ISO @deftypefun double sinh (double @var{x}) The @code{sinh} function returns the hyperbolic sine of @var{x}, defined mathematically as @w{@code{exp (@var{x}) - exp (-@var{x}) / 2}}. The @@ -355,7 +355,7 @@ function fails, and sets @code{errno} to @code{ERANGE}, if the value of @end deftypefun @comment math.h -@comment ANSI +@comment ISO @deftypefun double cosh (double @var{x}) The @code{cosh} function returns the hyperbolic cosine of @var{x}, defined mathematically as @w{@code{exp (@var{x}) + exp (-@var{x}) / 2}}. @@ -364,7 +364,7 @@ of @var{x} is too large; that is, if overflow occurs. @end deftypefun @comment math.h -@comment ANSI +@comment ISO @deftypefun double tanh (double @var{x}) This function returns the hyperbolic tangent of @var{x}, whose mathematical definition is @w{@code{sinh (@var{x}) / cosh (@var{x})}}. @@ -424,27 +424,27 @@ generator. There is no standard meaning for a particular seed value; the same seed, used in different C libraries or on different CPU types, will give you different random numbers. -The GNU library supports the standard ANSI C random number functions +The GNU library supports the standard @w{ISO C} random number functions plus another set derived from BSD. We recommend you use the standard ones, @code{rand} and @code{srand}. @menu -* ANSI Random:: @code{rand} and friends. +* ISO Random:: @code{rand} and friends. * BSD Random:: @code{random} and friends. @end menu -@node ANSI Random -@subsection ANSI C Random Number Functions +@node ISO Random +@subsection ISO C Random Number Functions This section describes the random number functions that are part of -the ANSI C standard. +the @w{ISO C} standard. To use these facilities, you should include the header file @file{stdlib.h} in your program. @pindex stdlib.h @comment stdlib.h -@comment ANSI +@comment ISO @deftypevr Macro int RAND_MAX The value of this macro is an integer constant expression that represents the maximum possible value returned by the @code{rand} @@ -454,14 +454,14 @@ may be as low as @code{32767}. @end deftypevr @comment stdlib.h -@comment ANSI +@comment ISO @deftypefun int rand () The @code{rand} function returns the next pseudo-random number in the series. The value is in the range from @code{0} to @code{RAND_MAX}. @end deftypefun @comment stdlib.h -@comment ANSI +@comment ISO @deftypefun void srand (unsigned int @var{seed}) This function establishes @var{seed} as the seed for a new series of pseudo-random numbers. If you call @code{rand} before a seed has been |