正整数开方,不用sqrt

实现两位数精度

#include<stdio.h>
double sqrtss(double src)
{
    double mid,low,high;
    low  = 0.0;
    if(src>1.0)
        high = src; 
    else
        high = 1.0 ;
    mid = (low + high)/2.0;
    while(1)
    {
        if((src - mid*mid)<EPSION&&(src - mid*mid)>-EPSION)
            return mid;
        if(src > mid*mid)
            low = mid;
        else
            high = mid;
        mid = (high + low)/2.0;
    }
}
int main()
{
    float src;
    while(~scanf("%f",&src))
    {
        printf("%.6f\n",sqrtss(src*1.0));

    }
    return 0;
}