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]
+def cz(num):
+    hight=len(num_list)-1
+    mid=0
+    while True:
+        mid=(low+hight)//2
+        if num_list[mid]>num:
+            hight=mid-1
+        elif num_list[mid]<num:
+            low=mid+1
+        if num_list[mid]==num:
+            print(str(num)+"在列表里的索引是"+str(mid))
+            return 0
+        if hight<low:
+            print(str(num)+"不在列表中")
+            return 0
+cz(9)
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