about installing development packages...

Hi all,
I would like to install development tools / libs, such as gcc. But I haven’t selected them during the opensuse 11.2 x64 installation, and when I use the yast2/software management to install programming packages, there are many items, and I don’t know which should/should not be installed. Even when I select all to install, it seems many conflicts reported. So is there any easy way to install the development packages properly, without reinstalling the os?
thx a lot!!!

In Software Management filter the view by ‘Patterns’
Check the first option under the Development section: ‘Base Development’