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]
+num = int(input('输入:')) 
+low = 0
+hight = len(num_list) - 1 
+mid = (low + hight) // 2
+guess = num_list[mid]
+if guess == num:
+    print('找到了,位置是：',mid)
+elif mid < num:
+    low = mid + 1
+else:
+    hight = mid - 1
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