Runtime-Support
Functions -
Summary
Floating-Point
Math
Functions
(Continued)
Macro
and
Syntax
Description
double
ceil(x)
Returns the smallest integer greater than or equal
to
x
double
x;
double
cos(x)
Returns the cosine
of
a
floating-point
value x
double
x;
double
cosh(x)
Returns the hyperbolic cosine
of
a
floating-point
value x
double
x;
double
exp(x)
Returns the exponential function
of
a
real
number x
double
x;
double
fabs(x)
Returns the absolute value
of
a
floating-point
value x
double
x;
double
floor(x)
Returns the largest integer less than or equal
to
x
double
x;
double
fmod(x,
y)
Returns the floating-point remainder
of
x/y
double
x,
y;
double'
frexp(value,
exp)
Breaks a floating-point value into a normalized fraction and
double
value;
an
integer power
of
2
int
*exp;
double
Idexp(x,
double
x;
exp)
Multiplies a floating-point number
by
an
integer power
of
2
int
exp;
double
log(x)
Returns the natural logarithm
of
a real number x
double
x;
double
loglO(x)
Returns the base-1 0 logarithm
of
a
real
number x
double
x;
double
modf(value,
iptr)
Breaks a floating-point number into into a signed integer and
double
value;
a signed fraction
int
*iptr;
double
pow(x,
y)
double
x,
y;
Returns x raised
to
the power y
double
sin(x)
Returns the sine
of
a
floating-point
value x
double
x;
double
sinh(x)
Returns the hyperbolic sine
of
a
floating-point
value x
double
x;
double
sqrt(x)
double
x;
Returns the nonnegative square root
of
a real number x
double
tan
(x)
Returns the tangent
of
a
floating-point
value x
double
x;
double
tanh
ex)
Returns the hyperbolic tangent
of
a
floating-point
value x
double
x;
Variable
Argument
Functions
and
Macros
Header
File:
stdarg.
h
Function/Macro
and
Syntax
Description
type
va-arg(ap,
type)
Accesses the next argument
of
type
type
in a
va-list
ap;
variable-argument list
void
va-end(ap)
Resets
the calling mechanism after using
va-arg
va-list
ap;
void
va-start(ap,
parmN)
Initializes
ap
to
point
to
the first operand in the
va-list
ap;
variable-argument list
6-10
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