save project

diy1.py

@@ -7,5 +7,8 @@ while True:
     if name == username and passward == userpassword:
         print("登录成功")
         break
-    print("用户名和密码错误！请重新输入")
+    if name != username:
+        print("用户名不存在，请重新输入！")
+    if passward != userpassword:
+        print("用户名和密码错误！请重新输入")
 print("欢迎来到贝尔编程！")