@GaGa111 ... you should not put in the c++ code from the IDE, but the HTML.
so do a "view source code" in your browser and copy paste this generated HTML to the test form of W3C. Viewing the HTML sourcecode in your browsr shouldn't take longer than a second (depending on how fast you can do a right click on your mouse and choose "view source code"...). Allways check your HTML outputs!