二分法求方程的根

#include<stdio.h>
#include<math.h>
int main()
{
double x0,x1,x2,y0,y1,y2;
do
{

scanf("%lf%lf",&x1,&x2);
y1=2*x1*x1*x1-4*x1*x1+3*x1-6;
y2=2*x2*x2*x2-4*x2*x2+3*x2-6;
}
while(y1*y2>=0);
do
{
x0=(x1+x2)/2;
y0=2*x0*x0*x0-4*x0*x0+3*x0-6;
if(y0*y1<0)
{
y2=y0;
x2=x0;
}
else{
y1=y0;
x1=x0;
}
}
while(fabs(y0)>=1e-5);
printf("%.6lf",x0);
return 0;
}