save project

diy1.py

@@ -5,6 +5,11 @@ while True:
     password = input("请输入密码：")
     if name == username and password == userpassword:
         print("登录成功！")
-        break   
-    print("用户名或密码错误")
-print("欢迎来到贝尔编程！")
\ No newline at end of file
+        break
+    if name != username:
+        print("用户名错误")
+    if name != username and password != userpassword:
+        print("密码和用户名错误")
+    if password != userpassword:
+        print("密码错误")
+print("欢迎来到贝尔编程！")