用c语言编程二分法的题题目：用二分法求方程xxxx-3...

精选知识

#include

float f(float x)

{

return (x * x * x * x - 3 * x + 1);

}

void main()

{

float wucha = ((float)1/(float)2)*((float)1/((float)10*(float)10));

float maxi = 0.4;

float mini = 0.3;

float midi = (maxi + mini) / 2.0;

while ((maxi - midi) > wucha)

{

if (f(maxi) * f(midi) >= 0)

{

maxi = midi;

midi = (maxi + mini) / 2.0;

}

else

{

mini = midi;

midi = (maxi + mini) / 2.0;

}

}

printf("答案是：%f\n", midi);

}

//0.340625

其他回答

float flag=0.3*0.3*0.3*0.3-3*0.3+1>0?1:0;

float fun(float left ,float right){

float mid=(left+right)/2;

float res=mid*mid*mid*mid-3*mid+1;

if(abs(res)0)||(flag==0&&res