save project

diy1.py

@@ -7,7 +7,9 @@ while True:
     if name == username and password == userpassword:
         print("登录成功")
         break
-    else:
-        print("输入错误")
+    if name!=username:
+        print("用户名错误")
+    if password!=userpassword:
+        print("密码错误")
     print("欢迎来到贝尔编程")