If you want to keep a multiple-file program up to date,
then create a makefile named makefile,
and issue the following command to your computer:
make
If you want to express how one program file depends on others,
then instantiate the following pattern in your makefile, taking
care to start in the first column:
file name: list of depended-on files
If you want to express what should be done when a change occurs
in a depended-on file,
then instantiate the following pattern, taking care to start with a tab: