用二分法求方程2x3-4x2+3x-6=0在（-10,10）之间的根

#include<stdio.h>
#include<math.h>
int main()
{
	float left,right,mid,fleft,fright,fmid;
	left=-10;
	right=10;
	mid=(left+right)/2;
	fmid=2*mid*mid*mid-4*mid*mid+3*mid-6;
	while(fabs(fmid)>1e-6)
	{
		fleft=2*left*left*left-4*left*left+3*left-6;
		fright=2*right*right*right-4*right*right+3*right-6;
		if(fleft*fmid>0)
		 left=mid;
	    else 
	     right=mid;
        mid=(left+right)/2;
	    fmid=2*mid*mid*mid-4*mid*mid+3*mid-6;
	}
	printf("the solution of the equation is %.2f.\n",mid); 
	return 0;
}