计算删除文件批的大小。

If I have the following command to delete some files I need a way of it displaying the total size of all the files before deleting them is this possible and how would I do this. The reason i need this is because I am making a program that can optimise your pc and this is a small section of the deleting bit. I can use any programming language that can be executed and used natively in windows and can be compiled to an exe.If I have the following command to delete some