PHP Novice, you great God!

PHP Novice to help you the great god!!!!!!!!
This is my database connection class, to use the method of changing the red line part

This is my index.php page, called the class file, and the top part

Now the problem is above the top.php, I use a function to generate the menu, but not to call Query_to_array () This query method
Check the information yourself, use new also not

Below is the content of the error

warning:missing Argument 1 for Mysqltool::__construct (), called in E:\Project\2013-8\DaHuangFeng\top.php on line ten A nd defined in E:\Project\2013-8\DaHuangFeng\inc\connclass.php on line 7

You God help me,!!!!!!!.
PHP class

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------Solution--------------------
No! Those parameters are used to connect to the database.
Database is not connected, how to query?

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