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
 # 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
+def qwqw(num):
+    global num_list
+    low=0
+    high=len(num_list)-1
+    mid=0
+    while low<=high:
+        mid=(low+high)//2
+        if num_list[mid]==num:
+            print(num,'的索引是',mid)
+            low=100
+            high=0
+        elif num_list[mid]<num:
+            low=mid+1
+        else:
+            high=mid-1
+qwqw(9)
+qwqw(20)
\ No newline at end of file