题目:用二分法求下面方程在(-10,10)之间的根:2x³-4x²+3x-6=0
下面给出二分迭代法求根的思路:下面思路的截图来源百度文库https://wenku.baidu.com/view/f4ca66ed7e21af45b207a817.html
#include<stdio.h>
#include<math.h>
#include<string.h>
int main()
{
float x0,x1,x2,fx0,fx1,fx2;
printf("please input x1,x2:");
scanf("%f%f",&x1,&x2);
fx1=2*x1*x1*x1-4*x1*x1+3*x1-6;
fx2=2*x2*x2*x2-4*x2*x2+3*x2-6;
do{
x0=(x1+x2)/2;
fx0=2*x0*x0*x0-4*x0*x0+3*x0-6;
if(fx0*fx1<0)
{
x2=x0;
fx2=fx0;
}else
{
x1=x0;
fx1=fx0;
}
}while(fabs(fx0)>1e-5);
printf("x=%f\n",x0);
return 0;
}