====== German2english ======
{{tag>natural_language knowledge_base}}
===== Description =====
Program translate german numbers to english, and english to german

**Source**:  Learn prolog now!, 2001, (course available on-line)
===== Download =====
Program source code: {{german2english.pl}}
===== Listing =====
<code prolog>
tran(eins,one).
tran(zwei,two).
tran(drei,three).
tran(vier,four).
tran(fuenf,five).
tran(sechs,six).
tran(sieben,seven).
tran(acht,eight).
tran(neun,nine).

listtran([],[]).
listtran([X|T1],[Y|T2]):-tran(X,Y),
			 listtran(T1,T2).</code>
===== Comments =====