csplit /tmp/PHoss.log '/^>>*$/' '{*}'
csplit -f chp11_ chap11.lst '/^listing /' '{*}'

The csplit program splits a file according to context. It's part of the GNU textutils.

$ csplit --help
 Usage: csplit [OPTION]... FILE PATTERN...
Output pieces of FILE separated by PATTERN(s) to files `xx01', `xx02', ...,
and output byte counts of each piece to standard output.

  -b, --suffix-format=FORMAT use sprintf FORMAT instead of %d
  -f, --prefix=PREFIX        use PREFIX instead of `xx'
  -k, --keep-files           do not remove output files on errors
  -n, --digits=DIGITS        use specified number of digits instead of 2
  -s, --quiet, --silent      do not print counts of output file sizes
  -z, --elide-empty-files    remove empty output files
      --help                 display this help and exit
      --version              output version information and exit

Read standard input if FILE is -.  Each PATTERN may be:

  INTEGER            copy up to but not including specified line number
  /REGEXP/[OFFSET]   copy up to but not including a matching line
  %REGEXP%[OFFSET]   skip to, but not including a matching line
  {INTEGER}          repeat the previous pattern specified number of times
  {*}                repeat the previous pattern as many times as possible

A line OFFSET is a required `+' or `-' followed by a positive integer.

Using it to split the tycpp samples. (Teach Yourself C++, http://web30.eppg.com/program/zip/tycpp.zip)

csplit -f chp11_ chap11.lst '/^listing /' '{*}'

— perfect. for this particular case, still need to remove the listing … at the top fo the cc files, though.