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
+bingo_num=20
+num_list = [1, 3, 5, 8, 11, 15, 17, 18, 20, 21]
+low=0
+max=len(num_list)-1
+while low <= max:
+    mid=(low+max)
+    guess_num=num_list[mid]
+    if guess_num==bingo_num:
+        print("是",mid)
+        break
+    elif guess_num<bingo_num:
+        low=mid+1
+    elif guess_num>bingo_num:
+        max=mid-1