save project

binary_search.py

-bingo_num = 20
-num_list = [1, 3, 5, 8, 11, 15, 17, 18, 20, 21]
-low = 0
-high = len(num_list)-1
-while low <=high:
-    mid = (low+high)//2
-    guess_num = num_list[mid]
-    if  guess_num == bingo_num:
-        print("找到了，它在列表里的索引时:",mid)
-        break
-    elif  guess_num<bingo_num
-        low = mid+1
-    elif  guess_num>bingo_num:
-        high = mid-1
-        
+import random
+
+alist = []
+for i in range(1,101):
+    alist.append(i)
+num = random.choice(alist)
+
+
+def binary_search(alist,num):
+    low = 0
+    high = len(alist)-1
+    while  low <=high:
+        mid = (low+high) // 2
+        guess = alist[mid]
+        if guess == num:
\ No newline at end of file
+            return mid
+        elif guess < num:
+            low = mid+1
+        else:
+            high = mid-1
+    return None
+result = binary_search(alist,num)
+print("老师给的数是:",num)
+print("他在列表里的索引是：",result)
+
+        
+        
+            
\ No newline at end of file