# 对二分查找的改进,也是对有序表进行查询
# 基本原理:
# mid = low + (high - low) * (key - a[low]) / (a[high] - a[low])
import random
Range = 10
Length = 5
flag = 0
pos = -1
list = random.sample(range(Range),Length)
goal = random.randint(0,Range)
# list = [0, 1, 4, 5, 7]
# goal = 10
# 冒泡排序处理
for i in range(Length-1): #控制循环次数
for j in range(Length-i-1): #控制每次循环内容
if list[j] > list[j + 1]:
list[j + 1], list[j] = list[j], list[j + 1]
print('search ',goal,', in list:',list)
min = 0
max = Length - 1
mid = min + int((max - min)*(goal - list[min])/(list[max] - list[min]))
if goal>list[max]:
pass
else:
while min<max:
mid = min + int((max - min) * (goal - list[min]) / (list[max] - list[min]))
if list[mid] == goal:
flag = 1
pos = mid
break
elif list[mid] > goal:
max = mid - 1
elif list[mid] < goal:
min = mid + 1
if flag:
print('find in ',pos+1,'th place')
else:
print('not found')