save project

diy1.py

@@ -7,5 +7,9 @@ while True:
     if name == username and password == userpassword:
         print("登录成功！")
         break
+    if name != username:
+        print(" 用户名不存在，重新输入密码")
+    if password != userpassword:
+        print("密码错误，重新输入")
 print("欢迎来到贝尔编程！")
  
\ No newline at end of file