I already tried "yum install gcc-c++"
Result is this:
# yum install gcc-c++
Loaded plugins: enabled_repos_upload, fastestmirror, imgbased-persist, package_upload,
product-id, search-disabled-repos, subscription-manager, vdsmupgrade
This system is not registered with an entitlement server. You can use subscription-manager
to register.
Loading mirror speeds from cached hostfile
* ovirt-4.2-epel:
mirror.seas.harvard.edu
No package gcc-c++ available.
Error: Nothing to do
Uploading Enabled Repositories Report
Loaded plugins: fastestmirror, product-id, subscription-manager
This system is not registered with an entitlement server. You can use subscription-manager
to register.
Cannot upload enabled repos report, is this client registered?