#include
#include
#define?N?19
double?way_of_line（double?*adouble?*bdouble?*pAdouble?*pB）;
double?way_of_two（double?*adouble?*bdouble?*pAdouble?*pB）;
double?f（double?*adouble?*bdouble?x）;
double?D（double?*adouble?*bdouble?Adouble?B）;
double?Dmax（double?*adouble?*bdouble?Adouble?Bint?*p）;
//double?way_of_newton（double?*adouble?*bdouble?*pxdouble?*py）;
?
int?main（void）
{
	int?i;
	int?max1=0max2=0max3=0;
	double?x[N]y[N];
	double?ab;
	double?A_lineB_lineA_twoB_twoA_dieB_die;
	double?*pA_line*pB_line*pA_two*pB_two*pA_die*pB_die;
	double?Dmax1Dmax2Dmax3;
	FILE?*fp;
	if（（fp=fopen（“Points.txt““r“））==NULL）{
		printf（“File?open?error!“）;
		return?0;
	}
	
	//讀取點的坐標數據?
	for（i=0;i		fscanf（fp“%lf%lf“&x[i]&y[i]）;
	}
	if（fclose（fp））{
		printf（“Can?not?close?the?Points!“）;
		return?0;
	}
	
	pA_line=&A_line;
	pB_line=&B_line;
	way_of_line（xypA_linepB_line）;
	pA_two=&A_two;
	pB_two=&B_two;
	way_of_two（xypA_twopB_two）;
	/*pA_die=&A_die;
	pB_die=&B_die;
	way_of_newton（xypA_diepB_die）;*/
	
	//輸出結果
	if（（fp=fopen（“result.txt““w“））==NULL）{
		printf（“File?open?error!“）;
		return?0;
	}
	fprintf（fp“方法一（取對數）???：a=%-12.6f??b=%.6f\n“exp（A_line）B_line）;
	fprintf（fp“均方誤差???????????：sqrt（D）=%f\n“D（xyA_lineB_line））;
	Dmax1=Dmax（xyA_lineB_line&max1）;
	fprintf（fp“最大偏差（絕對值）?：△（max）=%f??（x=%d）\n\n“Dmax1max1）;
	fprintf（fp“方法二（二分法）???：a=%-12.6f??b=%.6f\n“A_twoB_two）;
	fprintf（fp“均方誤差???????????：sqrt（D）=%f\n“D（xyA_twoB_two））;
	Dmax2=Dmax（xyA_twoB_two&max2）;
	fprintf（fp“最大偏差（絕對值）?：△（max）=%f??（x=%d）\n\n“Dmax2max2）;
	/*fprintf（fp“方法三（迭代法）???：a=%-12.6f??b=%.6f\n“A_dieB_die）;
	fprintf（fp“均方誤差???????????：sqrt（D）=%f\n“D（xyA_dieB_die））;
	Dmax2=Dmax（xyA_twoB_two&max3）;
	fprintf（fp“最大偏差（絕對值）?：△（max）=%f??（x=%d）\n\n“Dmax3max3）;*/
	//fprintf（fp“均方誤差???????????：sqrt（D）=%f\n“D（xy0.2411870.308055））;
	//fprintf（fp“均方誤差???????????：sqrt（D）=%f\n“D（xy0.236580.30905））;
	if（fclose（fp））{
		printf（“Can?not?close?the?result!“）;
		return?0;
	}