1. Click the current target to highlight it, then select Edit -> Duplicate
from the menu bar.
2. Click the new target to highlight it, then select File -> Get Info
from the menu bar.
3. Rename the new target to a name of your choice. This example will use
the arbitrary name "object".
4. Click the Build tab and change the Product Name to match
the name from step 3 (i.e. "object"). Close the inspector when finished.
5. Click the Source folder to Highlight it, then select
File -> New File... from the menu bar.
6. Create a new C file.
7. Name the new file to match the new target name (i.e. "object.c") and uncheck
Also create "object.h". In the Targets: pane uncheck the old target
"obj1" and check the new target "object".
8. Add code to the new file and compile when finished.
