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
+low=0
+high=len(num_list)-1
+mum=20
+while high>=low:
+    mid=(high+low)//2
+    guess=num_list(mid)
+    if guess = num:
+        print("找到了","索引是",mid)
+        exit()
+    elif uess < num:
+        low=mid+1
+    else:
+        low=mid-1
+print("这个数字不存在")
+        
\ No newline at end of file