[CentOS] yum install -y gcc?

Dear All
I tried to install GCC3.x , required to compile Asterisk , on my CentOS 5
server as the followings :
#yum install -y gcc
But in the middle of the installation , my server went down from sudden
power cut . After power recovery , I tried again but I am facing with the
following error :
"Error:Missing dependency : libstdc++-devel = 4.1.2-46.el5_4.1 is needed by
package gcc-c++"
Can you please let me know what is its meaning and how I can proceed to
re-install it ?
Thank you
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