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
+num_list = [1, 3, 5, 8, 11, 15, 17, 18, 20, 21]
+bn=20
+l=0
+h=len(num_list)
+
+while l<=h:
+    m=(l+h)//2
+    gn=num_list[m]
+    if gn==bn:
+        print('找到了，索引值',m)
+        break
+    elif gn<bn:
+        l=m+1
+    elif gn>bn:
+        h=m-1
\ No newline at end of file