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
-num_list = [1, 3, 5, 8, 11, 15, 17, 18, 20, 21]
\ No newline at end of file
+
+m=21
+
+num_list = [1, 3, 5, 8, 11, 15, 17, 18, 20, 21]
+low=0
+hight=len(num_list)-1
+while low<=hight:
+    mid=(low+hight)//2
+    middle=num_list[mid]
+    if m == middle:
+        print(mid)
+        break
+    elif m>middle:
+        low=mid+1
+    else :
+        hight=mid-1     
+
+
+
+
+
+
+
+
+
+
+
+