欢迎大家赞助一杯啤酒🍺 我们准备了下酒菜：Formal mathematics/Isabelle/ML, Formal verification/Coq/Agda, C++/Erlang/Lisp
GNU Scientific Library
来自开放百科 - 灰狐
（版本间的差异）
| 第1行： | 第1行： | ||
| − | |||
== Example == | == Example == | ||
The following example program calculates the value of the [[Bessel function]] for 5 [http://www.gnu.org/software/gsl/manual/gsl-ref_2.html#SEC10]: | The following example program calculates the value of the [[Bessel function]] for 5 [http://www.gnu.org/software/gsl/manual/gsl-ref_2.html#SEC10]: | ||
| 第29行： | 第28行： | ||
http://www.gnu.org/software/gsl/ | http://www.gnu.org/software/gsl/ | ||
| − | [[Category: | + | [[Category:GNU]] |
| + | [[Category:Software Development]] | ||
2010年8月17日 (二) 10:10的版本
Example
The following example program calculates the value of the Bessel function for 5 [1]:
#include <stdio.h>
#include <gsl/gsl_sf_bessel.h>
int
main (void)
{
double x = 5.0;
double y = gsl_sf_bessel_J0 (x);
printf ("J0(%g) = %.18e\n", x, y);
return 0;
}
The example program has to be linked to the GSL library upon compilation:
g++ -L/usr/local/lib example.c -lgsl -lgslcblas -lm
The output is shown below, and should be correct to double-precision accuracy:
J0(5) = -1.775967713143382920e-01
分享您的观点
