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C++ is a language which must be compiled before you can run any executables.

You cannot execute a .cpp directly.

I would suggest you first try and find some good C++ tutorials, get sufficient experience with it and then come back to ROS.

C++ is a language which must be compiled before you can run any executables.

You cannot execute a .cpp directly.

You'll first have to build your workspace (see wiki/catkin/Tutorials/create_a_workspace for a bare-bones tutorial about this).

I would suggest you first try and find some good C++ tutorials, get sufficient experience with it and then come back to ROS.ROS. Learning all of this at the same time is not easy -- or at least, that is what my students tell me.