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]
+import random
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+num_list = []
+for i in range(101):
+    num_list.append(i)
+guess=random.randint(0,100)
+low=0
+high=len(num_list)-1
+while low<=high:
+    mid=(low+high)//2
+    if num_list[mid]==guess:
+        print("找到了，索引是：",mid)
+        break
+    elif num_list[mid]<guess:
+        low=mid+1
+    elif low>high:
+        print("没有")
+        break
+    else:
+        high=mid-1 
+print("随机数是：",guess)
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