save project

binary_search.py

+import random
 # 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=9
-low,high=0,len(num_list)-1
-while True:
-    mid=(low+high)//2
-    guess=num_list[mid]
-    if guess == num:
-        print('找到了','索引',mid)
-        break
-    elif guess < num:
-        low = mid+1
-    else:
-        high = mid-1
-    if high<low:
-        print("找不到")
-        break
-    
+num_list=[]
+for i in range(1,101):
+    num_list.append(i)
+suibian=random.choice(num_list)
+
+def zhao(num_list,num):
+    low,high=0,len(num_list)-1
+    while high>=low:
+        mid=(low+high)//2
+        guess=num_list[mid]
+        if guess == num:
+            print('找到了','索引',mid)
+            exit()
+        elif guess < num:
+            low = mid+1
+        else:
+            high = mid-1
\ No newline at end of file
+    print("找不到")
+print(suibian)
+zhao(num_list,suibian)
\ No newline at end of file