save project

my_search.py

 import random
 import random
 
 
-alist = []
+shu = []
 for i in range(1, 101):
 for i in range(1, 101):
-    alist.append(i)
-num = random.choice(alist)
+    shu.append(i)
+num = random.choice(shu)
+
 # 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
 # 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 a (shu,num):
+    xs = 0
+    ds = len(shu)-1
+    while xs <= ds:
+        zjds = (xs + ds) // 2
+        cds = shu[zjds]
+        if cds == num:
+            print('他在第',zjds + 1,'个')
+            return zjds
+        elif cds < num:
+            xs = zjds + 1
+        else:
+            ds = zjds - 1
 
 
-def binary_search(alist,num):
+b = a(shu,num)
\ No newline at end of file
+print(num)
+print(b)
\ No newline at end of file