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]
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+num_list = [1, 3, 5, 8, 11, 15, 17, 18, 20, 21]
+guess=20
+low=0
+high=len(num_list)-1
+while high>=low:
+    mid=(low+high)//2
+    if num_list[mid]==guess:
+        print('找到了')
+        exit()
+    elif num_list[mid]<guess:
+        low=mid+1
+    else:
+        high=mid-1
+
+
+print('没找到')
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