The Tutorial shows you How to Install and Getting-Started with the Latest Eclipse 2023-03 R IDE C/C++ for Linux Xubuntu 12.04 Precise Pangolin i386/Amd64 Xfce Desktop.
There is the Possibility also to Install the Eclipse Platform via apt-get But the Ubuntu Linux Precise apt Repositories from which Linux Xubuntu Precise Depends are still Back to Eclipse 3.7.
So at the Moment if you want Install the Latest Eclipse 2023-03 R Build on Linux Xubuntu 12.04 you will Need to Download and Install Eclipse 2023-03 R C/C++ Development Release for Linux.
Hence, here we Proceed Directly to Download and Installation of the Whole Eclipse for C/C++ Development Linux Release.
The Content give Focus Only to the Essentials Instructions and Commands to make it Easier to Follow.
Finally, to the article Bottom you find a Link to Create a Launcher and Hello-World Application Quick Starting.

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Download Latest Eclipse C/C++ for Linux:
Eclipse 2023-03 R IDE C/C++ Linux -
Double-Click on Archive & Extract Eclipse into /tmp
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Open Terminal Window
(Press “Enter” to Execute Commands) -
Install the Gnu C++ Compiler for Xubuntu
sudo su
If Got “User is Not in Sudoers file” then see: How to Enable sudo
apt-get install g++
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Relocating Eclipse.
sudo chown -R root:root /tmp/eclipse && mv /tmp/eclipse /opt/
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Starting Eclipse from Terminal.
Making a Symlink
ln -s /opt/eclipse/eclipse /usr/local/bin/eclipse
After you can Start Eclipse from Terminal simply with:
eclipse
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Create an Eclipse Desktop Launcher for Easy-Starting:
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Execute Eclipse C++ Hello-World Project:
Eclipse C++ Getting-Started SetUp & Hello-World: