复制内容到剪贴板
代码:
#include<iostream.h>
float Lagrange(float *x,float *y,float xx,int n)
{
int i,j;
float *a,yy=0.0;
a =new float[(n*sizeof(float))];
for( i=0;i<=n-1;i++ )
{
a[i]=y[i];
for( j=0;j<=n-1;j++ )
if(j!=i)
a[i]*=(xx-x[j])/(x[i]-x[j]);
yy+=a[i];
}
delete[] a;
return yy;
}
void main()
{
float x[4]={0.56160,0.56280,0.56401,0.56521};
float y[4]={0.82741,0.82659,0.82577,0.82495};
float xx=0.5635,yy;
float Lagrange(float *,float *,float ,int);
yy =Lagrange(x,y,xx,4);
cout<<"x="<<xx<<'\t'<<"y="<<yy<<endl;
}
