moo.6

UNIX v6源代码 这几乎是最经典的unix版本 unix操作系统设计和莱昂氏unix源代码分析都是用的该版

.th MOO VI 11/1/73
.sh NAME
moo \*- guessing game
.sh SYNOPSIS
.bd /usr/games/moo
.sh DESCRIPTION
.it Moo
is a guessing game imported from England.
The computer picks a number consisting
of four distinct decimal digits.
The player guesses four distinct digits
being scored on each guess.
A `cow' is a correct digit in an incorrect position.
A `bull' is a correct digit in a correct position.
The game continues until the player guesses the number
(a score of four bulls).
.sh BUGS