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
+a=17# 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]
+low=0
+high=len(num_list)--1
+def w(an):
+    while low <= high:
+    mid=(low+high)//2
+    g=num_list[mid]
+    if g == a:
+        print("找到了",a)
+        break
+    elif g < a:
+        low =mid+1
+    else:
+        high=mid-1
+
+    
+    
+
+
+
+
+
+
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