save project

binary_search.py

+import random
 
 
-bingo_num=20
-num_list=[1,3,5,8,11,15,17,18,20,21]
-low=0
-high=len(num_list)-1
+alist=[]
+for i in random(1,101):
+    alist.append(i)
+num=random.choice(alist)
 
 
 
 
-while low<=high:
-    mid=(low+high) // 2
-    guess_num=num_list[mid]
-    if guess_num==bingo_num:
-        print("找到了，它在列表里的索引是：",mid)
-        break
-    elif guess_num<bingo_num:
-        low=mid+1
-    elif guess_num>bingo_num:
-        high=mid-1
+def binary_search(alist,num)
+    low=0
+    high=len(num_list)-1
+    while low<=high:
+        mid=(low+high) // 2
+        guess=list[mid]
+        if guess==num:
+            return mid
+        elif guess<num:
+            low=mid+1
+        else: 
+            high=mid-1
+