save project

my_search.py

@@ -6,4 +6,18 @@ for i in range(1, 101):
 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):
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+def binary_search(alist,num):
+mina=0
+maxa=len(alist)-1
+while mina<=maxa:
+    mid=(mina+maxa)//2
+    gnum=alist[mid] 
+    if gnum==num:
+        print('猜的数是：',mid)
+        break
+    elif gnum<num:
+        mina=mid+1
+    else :
+        maxa=mid-1  
+
+binary_search(alist,num)   
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