[實作] J008：HOC (High Order Calculator)
J008：HOC (High Order Calculator)
The Unix Programming Environment - Brian Kernighan, Rob Pike
(Prentice-Hall 1984, ISBN 0-13-937681-X)
下載：
# The original code from the Unix Programming Environment book, including hoc.
https://web.archive.org/web/20000816174822/http://cm.bell-labs.com/who/bwk/unixprogenv.tar.gz
# Source code of hoc from Bell Labs, released as free software. This is the
Research Unix version, slightly improved over the one in the book.
https://web.archive.org/web/19991011232359/http://netlib.bell-labs.com/~bwk/hoc.sh
# an extended version of hoc by Nelson H. F. Beebe.
http://www.math.utah.edu/pub/hoc/
http://ftp.math.utah.edu/pub/hoc/hoc-7.0.6.beta.pdf
http://ftp.math.utah.edu/pub/hoc/hoc-7.0.6.beta.zip
http://ftp.math.utah.edu/pub/hoc/hoc-7.0.6.beta.zip-lst
# an extended version of hoc by Nadav Y. Har'El.
http://nadav.harel.org.il/homepage/hoc/
http://nadav.harel.org.il/homepage/hoc/hoc-9.2.tgz
http://nadav.harel.org.il/homepage/work.html
# yacc-1.9.3-1
https://sourceforge.net/projects/tiny-cobol/files/misc/yacc-1.9.3-1.mingw32.zip
https://sourceforge.net/projects/tiny-cobol/files/misc/yacc-1.9.3-1.tar.gz
# yacc, or oyacc, is a portable version of the OpenBSD Yacc program.
https://github.com/ibara/yacc
https://github.com/ibara/yacc/releases
https://github.com/ibara/yacc/releases/tag/oyacc-6.6
https://github.com/ibara/yacc/releases/download/oyacc-6.6/oyacc-6.6.tar.gz
後記：
hoc-7.0.6 沒實作，因為 hoc 只是學習教材，沒必要搞成 DSL。
oyacc-6.6 實際上就是 yacc193，加 o 表示 OpenBSD (Berkeley Software Distribute)
而 byacc (Berkeley Yacc) 現在通稱為 yacc。早舊的 yacc 反而要稱之 Unix yacc。
6.6 大概是他實作的版本，但只是要加入 portable 也要到 6.6，難道每加入一個 OS 就
要加一版本？
hoc6o 這個目錄，只是要驗證 oyacc 的正確性。
(END)
https://github.com/jans0204/J008-HOC-High-Order-Calculator-
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