VC编写贝塞尔函数,现在做一个小程序,需要用到matlab中的besselj(nu,Z...

发布网友发布时间：2024-08-08 10:01

共1个回答

热心网友时间：2024-08-08 10:27

不用混编，直接用_jn。
double _jn( int n, double x );
这是Help：
_j0, _j1, _jn

These routines return Bessel functions of the first kind: orders 0, 1, and n, respectively.
Example
#include <math.h>
#include <stdio.h>

int main( void )
{
double x = 2.387;
int n = 3, c;

printf( "Bessel functions for x = %f:\n", x );
printf( " Kind Order Function Result\n\n" );
printf( " First 0 _j0( x ) %f\n", _j0( x ) );
printf( " First 1 _j1( x ) %f\n", _j1( x ) );
for( c = 2; c < 5; c++ )
printf( " First %d _jn( %d, x ) %f\n", c, c, _jn( c, x ) );
printf( " Second 0 _y0( x ) %f\n", _y0( x ) );
printf( " Second 1 _y1( x ) %f\n", _y1( x ) );
for( c = 2; c < 5; c++ )
printf( " Second %d _yn( %d, x ) %f\n", c, c, _yn( c, x ) );
}