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]
+bingo_num=20
+low=0
+high=len(num_list)-1
+
+while low<=high:
+    mid=(low+high)//2    #取中间值的索引位置   取整
+    guess_num=num_list[mid]  #猜测的数值
+    if guess_num==bingo_num:
+        print("找到了，它在列表里的索引是",mid)
+        break
+    elif guess_num<bingo_num:
+        low=mid+1
+    elif guess_num>bingo_num:
+        high=mid-1
+
+