I moved your post away from the Howto's. It's not meant for asking questions, but for sharing information on how to get certain things done. Look at some of the posts in the Howto section to understand what I mean.
How can I instal pascal and c++?I am using vl 5.9.1 SOHO.
You don't install a programming language. For c++, gcc-g++ is the standard compiler in Linux. You can use pretty much any text editor you want to program in. Since you're using SOHO, I suggest Kate for simple "hello world"- type short programs. It's in Menu->Utilities->Editors->Kate. It has great highlighting for a lot of programming languages, including c++ and Pascal. If you need an integrated development environment, I suggest kdevelop. There's a package in the "extra" repository.