utilities/bin

trinity/src

This commit is contained in:

dtb

2022-05-14 20:52:57 -04:00

parent 3334b25b77

commit 27a1dead1a

17 changed files with 324 additions and 0 deletions

@@ -0,0 +1,14 @@
 #!/bin/sh
 # science speak from wikipedia
 ! eq $# 2 && printf "Usage: $0 [minuend] [subtrahend]\n" >/dev/stderr && exit 1
 ! stris int "$1" && printf "$0: $1: Not an integer\n" >/dev/stderr && exit 1
 ! stris int "$2" && printf "$0: $2: Not an integer\n" >/dev/stderr && exit 1
 minuend=$1
 subtrahend=$2
 # (- a b) == (+ a (* b -1))
 printf "%b\n" $(add $minuend $(multiply $subtrahend -1))
 exit 0