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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+import random 
+num_list = []
+
+for i in range(1,101):
+    num_list.append(i)
+low=0
+number=0
+high=len(num_list)-1
+guess=random.choice(num_list)
+while True:
+    mid=(low+high)//2
+    num=num_list[mid]
+    if num==guess:
+        number+=1
+        print("你说的值的索引是",mid,"次数是",number)
+        break
+    elif num < guess:
+        number+=1
+        low=mid+1
+    elif num > guess:
+        number+=1
+        high=mid-1 
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