I'm wondering how to do this in C: (i need this for my project)...

how to replace this line
http://img368.imageshack.us/img368/7854/sp326rt3.jpg
with a printf & scanf statement? i want to hide those lines and it will be replaced with another statement.

and how to make the screen window fixed (meaning not resizable anymore)? :)

>i want to hide those lines and it will be replaced with another statement.
Technically those lines don't belong to you and you shouldn't be messing with them. This is akin to the "how do I clear the screen" question, where the answer is "you don't, it's anti-social". But if you want to get rid of them, the easiest way is to clear the screen.

>how to make the screen window fixed (meaning not resizable anymore)?
Your ability to control the console window is pretty limited. If you want more control, switch to a graphical interface using Win32 or MFC. But keep in mind that as soon as you get into windows and graphics, C++ gets much more complicated.