save project

diy2.py

@@ -6,7 +6,10 @@ while True:
     if name == username and password == userpassword:
         print("登录成功!")
         break
-    elif
+    elif name != username:
+        print('没有此账号')
+    elif password != userpassword:
+        print('密码与账号不匹配')
     else:    
         print("用户名和密码错误!请重新输入")
 print("欢迎来到贝尔编程!")
\ No newline at end of file