用迭代法 求方程x=cosx得根,是误差小于10的负六.
{double x1 x2;
x1 = 0.0;
x2 = cos(x1);
while fabs(x2-x1) > (1e-6）
{ x1 = x2;
x2 = cos(x1);
}
printf ("x=%f\n",x2);
}
求解题思路我看不懂啊