chord2m.c

解非线性方程的双点弦截法的c程序

/* chord2m.c: two points chord iterative method */
#define MI 100
#include "chord2.c"
double f(double x);
extern int chord2(double x[2]);
void main()
{
	int k;
	double x[2];
	system("cls");
	printf("Two points Chord iterative method:\n");
	x[0]=2.0*atan(1.0);
	x[1]=2.0*x[0];
	k=chord2(x);
	if(k>=MI) printf("%d times iterative isn't success!\n",k);
	else printf("Ok!  k=%d  root=%15.8f\n",k,x[1]);
	getch();
}
/****function f()****/
double f(double x)
{
	double y;
	y=sin(x)-x/2.0;
	return(y);
}