.如何求根号2的值，并且按照我的需要列出指定小数位，比如根号2是1.41

float mysqrt(int n,int x)
{
        float t = 1.0;
        int i,j;

        for (i = 1; i <= n; i++)
        {
                float temp = t;
                float s = 1.0;
                for (j = 1; j < n; ++j)
                {
                        s = s * 0.1;
                }
                temp = t + s;
                while (temp * temp < x)
                {
                        t = temp;
                        temp += s;
                }
        }
        return t;
}