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Full Discussion: The n-queens problem
The Lounge War Stories The n-queens problem Post 302839479 by figaro on Thursday 1st of August 2013 05:38:15 PM
Old 08-01-2013
The n-queens problem
Our first computer science semester involved programming recursively. The teacher riled against the fact that we were learning our programming skills on an old DEC-VAX machine. He therefore challenged us to bring the system to its knees using a program of our choice, because he argued it would confront the university directors with the fact that the machine needed replacement with something more modern and stable.
So a co-ed of mine and I set out to program the n-queens problem, recursively mind you, and gradually increased the value of n. At some point we felt the calculations were taking too long and still in hope that we would finally meet the challenge, we stepped into the teacher's office. Unfortunately the teacher we were supposed to see wasn't there, but his colleague was, who was also less than impressed with our initiative. He told us off by saying that the machine should be used by other people too. The machine was still in use after 2 semesters of computer science classes.
Last edited by figaro; 08-01-2013 at 08:01 PM..
 

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LEARN ABOUT OPENSOLARIS

i486

machid(1)							   User Commands							 machid(1)

NAME

       machid, sun, iAPX286, i286, i386, i486, i860, pdp11, sparc, u3b, u3b2, u3b5, u3b15, vax, u370 - get processor type truth value

SYNOPSIS

       sun

       iAPX286

       i386

       pdp11

       sparc

       u3b

       u3b2

       u3b5

       u3b15

       vax

       u370

DESCRIPTION

       The following commands will return a true value (exit code of 0) if you are using an instruction set that the command name indicates.

       sun	  True if you are on a Sun system.

       iAPX286	  True if you are on a computer using an iAPX286 processor.

       i386	  True if you are on a computer using an iAPX386 processor.

       pdp11	   True if you are on a PDP-11/45tm or PDP-11/70tm.

       sparc	  True if you are on a computer using a SPARC-family processor.

       u3b	  True if you are on a 3B20 computer.

       u3b2	  True if you are on a 3B2 computer.

       u3b5	  True if you are on a 3B5 computer.

       u3b15	  True if you are on a 3B15 computer.

       vax	  True if you are on a VAX-11/750tm or VAX-11/780tm.

       u370	  True if you are on an IBM(R) System/370tm computer.

       The  commands  that  do	not  apply will return a false (non-zero) value. These commands are often used within makefiles (see make(1S)) and
       shell scripts (see sh(1)) to increase portability.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       make(1S), sh(1), test(1), true(1), uname(1), attributes(5)

NOTES

       The machid family of commands is obsolete. Use uname -p and uname -m instead.

SunOS 5.11							    5 Jul 1990								 machid(1)
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