Newton迭代，割线法

#include<stdio.h>
#include<math.h>

double F(double x)
{
   
	return cos(x) - x;
}

double F_(double x)
{
   
	return -1 - sin(x);
}

double Newton(double x0,double e,int N)
{
   
	double x;
	int k = 1;
	do