2016 Update

Task/Four-bit-adder/Sed/four-bit-adder-1.sed

@@ -0,0 +1,52 @@
+#!/bin/sed -f
+# (C) 2005,2014 by Mariusz Woloszyn :)
+# https://en.wikipedia.org/wiki/Adder_(electronics)
+
+##############################
+# PURE SED BINARY FULL ADDER #
+##############################
+
+
+# Input two lines, sanitize input
+N
+s/ //g
+/^[01	 ]\+\n[01	 ]\+$/! {
+	i\
+	ERROR: WRONG INPUT DATA
+	d
+	q
+}
+s/[ 	]//g
+
+# Add place for Sum and Cary bit
+s/$/\n\n0/
+
+:LOOP
+# Pick A,B and C bits and put that to hold
+s/^\(.*\)\(.\)\n\(.*\)\(.\)\n\(.*\)\n\(.\)$/0\1\n0\3\n\5\n\6\2\4/
+h
+
+# Grab just A,B,C
+s/^.*\n.*\n.*\n\(...\)$/\1/
+
+# binary full adder module
+# INPUT:  3bits (A,B,Carry in), for example 101
+# OUTPUT: 2bits (Carry, Sum), for wxample   10
+s/$/;000=00001=01010=01011=10100=01101=10110=10111=11/
+s/^\(...\)[^;]*;[^;]*\1=\(..\).*/\2/
+
+# Append the sum to hold
+H
+
+# Rewrite the output, append the sum bit to final sum
+g
+s/^\(.*\)\n\(.*\)\n\(.*\)\n...\n\(.\)\(.\)$/\1\n\2\n\5\3\n\4/
+
+# Output result and exit if no more bits to process..
+/^\([0]*\)\n\([0]*\)\n/ {
+	s/^.*\n.*\n\(.*\)\n\(.\)/\2\1/
+	s/^0\(.*\)/\1/
+	q
+}
+
+b LOOP

Task/Four-bit-adder/Sed/four-bit-adder-2.sed

@@ -0,0 +1,14 @@
+./binAdder.sed
+1111110111
+1
+1111111000
+
+./binAdder.sed
+10
+10001
+10011
+
+./binAdder.sed
+0 1 1 0
+0 0 0 1
+111