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]
+a=20
+low=0
+high=len(num_list)-1
+while low<=high:
+    mid=(low+high)//2
+    mun=num_list[mid]
+    if mun2 ==a:
+        print("ZHAO DAO LE",mid)
+        break
+    elif mun<a:
+        low=mid+1
+    elif mun>a:
+        high=mid-1