Because i had a problem with my older GCC which is my stdio.h not found when i compiled my source code, so I decided to remove it from ubuntu software center, and install it again. but when I trying to install it again using Software center
and when I trying using terminal this is happen
This error could be caused by required additional software packages which are missing or not installable.
Furthermore there could be a conflict between software packages which are not allowed to be installed at the same time.
Details:The following packages have unmet dependencies:
I have installed libc6-dev & libc-dev on my machine
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
gcc : Depends: gcc-4.5 (>= 4.5.2-1~) but it is not going to be installed
Recommends: libc6-dev but it is not going to be installed or
E: Unable to correct problems, you have held broken packages.
so what's should I do for reinstall my gcc? thanks for your help