HI, can any body tell me how to install c,c++ compilers in fedora linux...plz.

I've never seen a Fedora install where they weren't installed. That said it would be something along the lines of (I use Fedora at work but not at home so this may not be correct):

yum install gcc

If that doesn't work post again and I or someone else will get you straightened out.

Try downloading some source code and building it with "make" before you try to reinstall gcc, most linux installs have the compiler setup and ready for your system already. If what you're meaning to ask about is an IDE so you can graphically manage your code, try installing kdevelop or eclipse.