long doubles


 
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Old 12-19-2002
long doubles

hey there,

i've been trrying to calculate the first 10000 fibonacci numbers using a long double. weird thing is that from a certain value it returns Inf.

i'm declaring the vars as
long double var;

and printing them to a file using:
fprintf(filepointer, "%.0Ld\n", var);

am i doing something wrong?
do i have to activate some special support for long doubles (using FreeBSD)? or compile it in a different way?

thx in advance
 
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atan2(3M)						  Mathematical Library Functions						 atan2(3M)

NAME
atan2, atan2f, atan2l - arc tangent function SYNOPSIS
cc [ flag... ] file... -lm [ library... ] #include <math.h> double atan2(double y, double x); float atan2f(float y, float x); long double atan2l(long double y, long double x); DESCRIPTION
These functions compute the principal value of the arc tangent of y/x, using the signs of both arguments to determine the quadrant of the return value. RETURN VALUES
Upon successful completion, these functions return the arc tangent of y/x in the range [ -, ] radians. If y is +-0 and x is < 0, +- is returned. If y is +-0 and x is > 0, +-0 is returned. If y is < 0 and x is +-0, -/2 is returned. If y is > 0 and x is +-0, /2 is returned. If x is 0, a pole error does not occur. If either x or y is NaN, a NaN is returned. If y is +-0 and x is -0, +- is returned. If y is +-0 and x is +0, +-0 is returned. For finite values of +-y > 0, if x is -Inf, +- is returned. For finite values of +-y > 0, if x is +Inf, +-0 is returned. For finite values of x, if y is +-Inf, +-/2 is returned. If y is +-Inf and x is -Inf, +-3/4 is returned. If y is +-Inf and x is +Inf, +-/4 is returned. If both arguments are 0, a domain error does not occur. ERRORS
No errors are defined. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+ SEE ALSO
atan(3M), isnan(3M), math.h(3HEAD)tan(3M), attributes(5), standards(5) SunOS 5.10 1 Sep 2002 atan2(3M)