save project

binary_search.py

+import random
 # 使用二分查找法，找出9和20在列表里面的索引
 # 使用二分查找法，找出9和20在列表里面的索引
-num_list = [1, 3, 5, 8, 11, 15, 17, 18, 20, 21]
+num_list = [1, 3, 5, 8, 11, 15, 17, 18, 20, 21]
\ No newline at end of file
+low = 0
+high = len(num_list) - 1
+mid = (low + high) // 2
+guess = 20
+num = 0
+while low <= high:
+    mid = (low + high) // 2
+    num = num_list[mid]
+    if num < guess:
+        low = mid + 1
+    elif num == guess:
+        print("找到了", mid)
+        break
+    elif num > guess:
+        high = mid - 1
+
+    
+    
+    
\ No newline at end of file