发布时间:2019-08-27 08:03:41编辑:auto阅读(1787)
算法如下:
1.猜测一个要求数字的平方根
2.用 原数 / 猜测数字
3.用 计算步骤2的值与猜测数字的平均值
4.步骤3得到的值为新的猜测值
5.判断新的猜测值和原猜测值是否相同,相同则跳转至步骤2,不同则该猜测值为原数平方根
# 在计算机中相同与不同,参考浮点数相同方法
python源码如下:
import math from math import fabs num_be = input("Please enter number use to solve square") while(not num_be.isdigit()): #保证输入的为整数 print("please enter number") num_be = input("Please enter number use to solve square") num_float = float (num_be) guess = input("please enter guess number") while(not guess.isdigit()): #保证输入的为整数 print("please enter number") guess = input("please enter guess number") guess_float = float (guess) precision = float (input("please enter the precision")) count = 0 #记录循环多少次 befor = 0 #前一个猜测值 sum =0 while(fabs(guess_float - befor) > precision): #使用绝对值防止,出现负值小于precision的情况 befor = guess_float guess_float = ((num_float / guess_float) + guess_float) / 2 count += 1 print("use count : ",count) print("THe ",num_float,"square is :", guess_float)
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