10-17-2016
Why don't you create the array dynamically, by e.g. using the output of seq? You'd still need to keep the starting value somewhere.
What kind of logics do you wish to apply when the days reach zero? Continue into the negative numbers? Reset to sth. like 30/31?
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SEQ(1) User Commands SEQ(1)
NAME
seq - print a sequence of numbers
SYNOPSIS
seq [OPTION]... LAST
seq [OPTION]... FIRST LAST
seq [OPTION]... FIRST INCREMENT LAST
DESCRIPTION
Print numbers from FIRST to LAST, in steps of INCREMENT.
-f, --format=FORMAT
use printf style floating-point FORMAT
-s, --separator=STRING
use STRING to separate numbers (default:
)
-w, --equal-width
equalize width by padding with leading zeroes
--help display this help and exit
--version
output version information and exit
If FIRST or INCREMENT is omitted, it defaults to 1. That is, an omitted INCREMENT defaults to 1 even when LAST is smaller than FIRST.
FIRST, INCREMENT, and LAST are interpreted as floating point values. INCREMENT is usually positive if FIRST is smaller than LAST, and
INCREMENT is usually negative if FIRST is greater than LAST. FORMAT must be suitable for printing one argument of type `double'; it
defaults to %.PRECf if FIRST, INCREMENT, and LAST are all fixed point decimal numbers with maximum precision PREC, and to %g otherwise.
AUTHOR
Written by Ulrich Drepper.
REPORTING BUGS
Report seq bugs to bug-coreutils@gnu.org
GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
General help using GNU software: <http://www.gnu.org/gethelp/>
Report seq translation bugs to <http://translationproject.org/team/>
COPYRIGHT
Copyright (C) 2011 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.
SEE ALSO
The full documentation for seq is maintained as a Texinfo manual. If the info and seq programs are properly installed at your site, the
command
info coreutils 'seq invocation'
should give you access to the complete manual.
GNU coreutils 8.12.197-032bb September 2011 SEQ(1)