save project

my_search.py

-import random
+# import random
 
-alist = []
-for i in range(1, 101):
-    alist.append(i)
-num = random.choice(alist)
+# alist = []
+# for i in range(1, 101):
+#     alist.append(i)
+# num = random.choice(alist)
 
-# 请完善二分查找函数binary_search(),查找出num在列表alist里面的索引位置
+# # 请完善二分查找函数binary_search(),查找出num在列表alist里面的索引位置
 
-def binary_search(alist,num):
-    low = 0
-    high = len(alist)
-    mid = (low+high)//2
-    guess = alist[mid]
-    while True:
-        mid = (low+high)//2
-        guess = alist[mid]
-        if guess == num:
-                print('找到这个数了！')
-                print('这个数在列表中的索引为'+str(mid))
-                break
-        elif guess < num:
-            low = mid+1
-        else:
-            high = mid-1
-        if high <= low:
-            print('列表中没有这个数！')
-            break
-binary_search(alist,num)
-
-# 使用二分查找法，找出数字在列表里面的索引
-# import random
-# length = random.randint(0,200)
-# num_list = []
-# for i in range(1,length):
-#     num_list.append(i)
+# def binary_search(alist,num):
 #     low = 0
-# high = len(num_list)-1
-
-# while True:
-#     print('输入Q退出程序！')
-#     number = input('请输入要寻找的数：')
-#     if number == Q:
-#         break
-#     elif locals(number) != int:
-#         break
-#     else:
+#     high = len(alist)
+#     mid = (low+high)//2
+#     guess = alist[mid]
 #     while True:
 #         mid = (low+high)//2
-#             guess = num_list[mid]
-#             if guess == int(number):
+#         guess = alist[mid]
+#         if guess == num:
 #                 print('找到这个数了！')
 #                 print('这个数在列表中的索引为'+str(mid))
 #                 break
-#             elif guess < int(number):
+#         elif guess < num:
 #             low = mid+1
 #         else:
 #             high = mid-1
 #         if high <= low:
 #             print('列表中没有这个数！')
 #             break
+# binary_search(alist,num)
+
+# 使用二分查找法，找出数字在列表里面的索引
+import random
+length = random.randint(0,200)
+print('-'*50)
+while True:
+    num_list = []
+    for i in range(1,length):
+        num_list.append(i)
+    low = 0
+    high = len(num_list)-1
+    print('输入Q退出程序！')
+    number = input('请输入要寻找的数：')
+    print('-'*50)
+    if number == 'Q':
+        break
+    else:
+        while True:
+            mid = (low+high)//2
+            guess = num_list[mid]
+            if guess == int(number):
+                print('找到这个数了！')
+                print('这个数在列表中的索引为'+str(mid))
+                print('-'*50)
+                break
+            elif guess < int(number):
+                low = mid+1
+            else:
+                high = mid-1
+            if high <= low:
+                print('列表中没有这个数！')
+                break
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