save project

binary_search.py

 # 使用二分查找法，找出9和20在列表里面的索引
+low = 0
 num_list = [1, 3, 5, 8, 11, 15, 17, 18, 20, 21]
+higt = len(num_list) - 1
+hidenum = int(input('请输入需查找数索引，'))
+
+while low <= higt:
+    mid = (low+higt) // 2     #mid = 5
+    gusse = num_list[mid]     #guess=11
+    if gusse == hidenum:
+        print('查找数索引为',mid)
+        break
+    elif gusse < hidenum:
+        low = mid+1
+    elif gusse > hidenum:
+        higt = mid-1
+
+    
+
+
+
+
+
+
+
+