This shell script runs all four steps required to compile, link, and run
our little test program, and detects errors, stopping the whole procedure
if any step fails.
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#!/bin/tcsh
echo "cc -c work.c"
cc -c work.c
if ($status != 0) exit
echo "cc -c use.c"
cc -c use.c
if ($status != 0) exit
echo "cc work.o use.o -o program"
cc work.o use.o -o program
if ($status != 0) exit
echo "running program ..."
program
echo "program exitted with status "$status
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remember that it needs to be "chmod +x"-ed