程序代码：

#include<stdio.h>
#include<math.h>
void main()
{
    float x0,x1,x2,fx0,fx1,fx2;
    do
    {
        printf("Enter x1&x2:\n");
        scanf("%f,%f",&x1,&x2);
        fx1=x1*((2*x1-4)*x1+3)-6;
        fx2=x2*((2*x2-4)*x2+3)-6;
    }while(fx1*fx2>0);
    do
    {
        x0=(x1+x2)/2;
        fx0=x0*((2*x0-4)*x0+3)-6;
        if((fx0*fx1)<0)
        {
            x2=x0;
            fx2=fx0;
        }
        else
        {
            x1=x0;
            fx1=fx0;
        }
    }while(fabs(fx0)>=1e-5);
    printf("x=%6.2f\n",x0);
}