#include <stdio.h>
#include <math.h>
int main()
{
double a=0, b=1, L=0, R=0, e, f, g, h, i;
e = 2*(a-1)+2*exp(-a)*(1-exp(-a));
f = 2*(b-1)+2*exp(-b)*(1-exp(-b));
for(i=1; i<=11; i++){
g = (a*f-b*e)/(f-e);
h = 2*(g-1)+2*exp(-g)*(1-exp(-g));
printf("x1 = %f, x2 = %f, x3 = %f, N = %f ", a, b, g, i);
if(fabs(h)<=0.000001){
printf ("\nroot = %f", g);
return 0;
}
else{
if(e*h<0){
b = g;
f = h;
L++;
R=0;
if(L>1){
e = e/2;
}
}
if(e*h>0){
a = g;
e = h;
R++;
L=0;
if(R>1){
f = f/2;
}
}
}
printf("KL = %f, KR = %f\n", L, R);
if(fabs(h)<0.000001){
printf("\nroot = %f", g);
return 0;
}
if(fabs((a-b))<0.0001){
printf("\nroot = %f", g);
return 0;
}
if(i == 11){
printf("\nroot = %f", g);
return 0;
}
}
}