#This sedscript, named roman.sed, converts Roman numerals to Arabic
#numerals.  Each line of input contains one lowercase Roman numeral.
#The output can be fed directly to the calculator program bc.  For
#example, ccxxxi becomes 100+100+10+10+10+1.

s/i/+1/g
s/v/+5/

s/x/+10/g
s/l/+50/

s/c/+100/g
s/d/+500/

s/m/+1000/g

#bc will not accept a plus at the start of a line.
s/^+//