save project

diy1.py

@@ -6,5 +6,9 @@ while True:
     if name == username and password == userpassword:
         print("sb登录成功")
         break
-    print("输入错误，请重新输入")
+    if name != username:
+        print("用户不存在！重新输入！")
+        continue
+    if usepassword != userpassword:
+        print("输入错误，请重新输入")
 print("欢迎来到贝尔编程器")
\ No newline at end of file