save project

my_search.py

 import random
-
-
+alist=[]
 for i in range(1, 101):
-    alist=[i]
     alist.append(i)
 num = random.choice(alist)
 # 请完善二分查找函数binary_search(),查找出num在列表alist里面的索引位置
 def binary_search(alist,num):
     low=0
     high=len(alist)-1
-    a=input(int('0，100的数'))
-    while i==a:
-        if i==a:
-            print("找到了")
-            break
-        elif i>a:
-            print("100",a)
-            b=input(int())
-            if i==b:
-                print("找到了")
-                break
-        elif i<a:  
-            print(a,"100")
-            b=input(int())  
-            if i==b:
-                print("找到了")
-                break
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+    while low<=high:
+        mid=(low+high)//2
+        guess=alist[mid]
+        if guess==num:
+            return mid
+        elif guess<num:
+            low=mid+1
+        else:
+            high=mid-1
+    return None
+result=binary_search(alist,num)
+print(num)
+print(result)
+    # a=input(int('0，100的数'))
+    # while i==a:
+    #     if i==a:
+    #         print("找到了")
+    #         break
+    #     elif i>a:
+    #         print("100",a)
+    #         b=input(int())
+    #         if i==b:
+    #             print("找到了")
+    #             break
+    #     elif i<a:  
+    #         print(a,"100")
+    #         b=input(int())  
+    #         if i==b:
+    #             print("找到了")
+    #             break
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