For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:wkazubski/openSUSE_Tumbleweed/home:wkazubski.repo
zypper refresh
zypper install codeblocks
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:wkazubski/15.6/home:wkazubski.repo
zypper refresh
zypper install codeblocks
For 15.5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:wkazubski/15.5/home:wkazubski.repo
zypper refresh
zypper install codeblocks