编写题解 1021: [编程入门]迭代法求平方根

解题思路:

注意事项:

参考代码:

import java.util.*;

public class Main {

    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);

        double a = sc.nextInt();

       double k=0;

        double n=0;

        k=a/2;

        while (true){

            n=(k+a/k)/2;

            if(Math.abs(n-k)<0.00001)break;

             k=n;

        }

        System.out.printf("%.3f",n);

    }

}