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
+flag = 17
+minIndex = 0
+minIndex = len(num_list)-1
+mid = (minIndex + minIndex)//2
+if num_list[mid] == flag:
+    print("中了！！是第"+str(mid)+"数")
+elif minIndex[mid] > flag:
+    minIndex = mid-1
+elif minIndex[mid] < flag:
+    minIndex = mid+1
+else:
+    print("nofoumd!!")
+    break
\ No newline at end of file