To build:
make all
There is an alternate version for those using Turbo-C or MSC. See alternate code below for details.
To use:
echo 4 | ./baruch
echo 7 | ./baruch
Try:
echo 2 | ./baruch
echo 3 | ./baruch
Why is there no output?
Alternate code:
This alternate code is for the very few
users
here who will need it. Nonetheless if you're using
Turbo-C or MSC, the code is available, based on the authors' remarks except that
the " #Q" string was not changed as that showed worse looking output instead
of improved output though admittedly we have no way to test the compilers in
question. YMMV.
Alternate build:
make alt
Alternate use:
Use baruch.alt as you would baruch.
Judges' remarks:
This program reads an integer between 4 and 99 from the stdin.
NOTE: The original program did not have a newline at the end of the file. We added a final newline to the file to make unpacking easy.
Authors' remarks:
The goal of this work was to write a program that solves the classic n-queens problem, with a board size of up to 99x99, while keeping the program as short as possible.
The program finds all possibilities to place N chess queens on an NxN chessboard so that no queen is in range of any other queen (not in the same column row or diagonal). For each solution the chess board and the place of the queens is printed to stdout.
This program is about as simple and as readable as possible. To make things even more simple we used a very limited subset of C:
- No pre-processor statements
- Only one, harmless,
forstatement - No
ifs - No
breaks - No
cases - No functions outside the standard C library
- No
gotos - No structures
In short, it contains no C language that might confuse the innocent reader. :-)
This program demonstrates the claim that in C, any program can be written using a single 'for' statement, as long as it is long enough.
For PC users:
In order to compile the program under Turbo-C or MSC, int should be inserted
at the beginning of the program. For better looking results it is recommended
to replace the " #Q" string with " \261\2".
Copyright and CC BY-SA 4.0 License:
This file is Copyright (c) 2023 by Landon Curt Noll. All Rights Reserved. You are free to share and adapt this file under the terms of this license:
Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
For more information, see: https://creativecommons.org/licenses/by-sa/4.0/