gcc is a package that was not included when you installed Mandriva. I assume you used a live-cd to install. There is only so much room on a CD and choices were made. Mandriva has a way of updating and installing additional packages, and you should find gcc for your Mandriva there. Also google for gcc to find out what it is and does.. A hint, it compiles. There is of course a "man gcc".
I will throw this at your feet. Many have found it helpful.
By the way, you may well be an idiot. You misspelled idiot, not a good sign. Welcome anyway.