save project

binary_search.py

 # 使用二分查找法，找出9和20在列表里面的索引
 # 使用二分查找法，找出9和20在列表里面的索引
-num_list = [1, 3, 5, 8, 11, 15, 17, 18, 20, 21]
+num_list = [1, 3, 5, 8, 11, 15, 17, 18, 20, 21]
\ No newline at end of file
+num=20
+x=0
+d=9
+
+while d>x:
+    z=(d+x)//2
+    guess=num_list[z]
+    if num>guess:
+        d=z-1
+    elif num<guess:
+        x=z+1
+    elif num==guess:
+        print('找到了')
+        break
+else:
+    print('找不到')