。

#include <stdio.h>
#include<stdlib.h>
#include<string.h>
#include<math.h>
int main(void)
{
    float left = -10, right = 10, mid,temp=10;

    while (fabs(temp) > 0.00001) {
        mid = (left + right) / 2;
        temp = ((2 * mid - 4) * mid + 3) * mid - 6;
        if (temp > 0) {//大于0说明太大右端点左移 
            right = mid;
        }
        else if((temp < 0)) {
            left = mid;
        }
    }
    printf("-10到10的根为=%f\n",mid);
    return 0;
}    

#include<stdio.h>
#include<math.h>
int main()
{
	double left = -10, right = 10, mid;
	double temp = 10;
	while (fabs(temp) > 1e-5)
	{
		mid = (left + right) / 2;
		temp = ((2 * mid - 4) * mid + 3) * mid - 6;

		if (temp > 0)
		{
			right = mid;
		}
		else if (temp < 0)
		{
			left = mid;
		}
	}
	printf("在(-10,10)的根为：%lf", mid);
	return 0;
}

double f(double define_range_left,double define_range_right){
    double left,right,mid,x;
    left = define_range_left;
    right = define_range_right;
    double fx;
    mid = (left+right)/2;
    x = mid;
    fx = 2*pow(x,3) - 4*pow(x,2) + 3*x - 6;
    if (fabs(fx)<=1e-5)
        return x;
    else{
        if (fx>0)
            return f(left,mid);
        else if (fx<0)
            return f(mid,right);
    }
}