mpdiv.c

来自「< C语言数值算法程序大全>>配套程序」· C语言 代码 · 共 25 行

#include "nrutil.h"
#define MACC 3

void mpdiv(q,r,u,v,n,m)
int m,n;
unsigned char q[],r[],u[],v[];
{
	void mpinv(),mpmov(),mpmul(),mpsub();
	int is;
	unsigned char *rr,*s;

	rr=cvector(1,(n+MACC)<<1);
	s=cvector(1,n+MACC);
	mpinv(s,v,n-m+MACC,m);
	mpmul(rr,s,u,n-m+MACC,n);
	mpmov(q,&rr[1],n-m+1);
	mpmul(rr,q,v,n-m+1,m);
	mpsub(&is,&rr[1],u,&rr[1],n);
	if (is) nrerror("MACC too small in mpdiv");
	mpmov(r,&rr[n-m+1],m);
	free_cvector(s,1,n+MACC);
	free_cvector(rr,1,(n+MACC)<<1);
}
#undef MACC