On Fri, 2010-11-19 at 20:05 -0800, Brian Lavender wrote: > Can you type in axioms into prolog from the command line? All I seem to > be able to do is load a program and query it. > > Can I just enter the following program at the prolog prompt? > > factorial(0,1). > > factorial(A,B) :- > A > 0, > C is A-1, > factorial(C,D), > B is A*D. > > > All I seem to be able to do is load it. I am using SWI prolog. > > $ swipl > ?- ['factorial.pl']. > true. > > If I try the following, I get an error. > > ?- factorial(0, 1). > ERROR: toplevel: Undefined procedure: factorial/2 (DWIM could not correct > goal)
Typing [user]. the way you typed ['factorial.pl']. will enter an interactive rule entry mode. When you're finished with that mode, hit Ctrl-D to return to query mode. --Ken _______________________________________________ vox-tech mailing list [email protected] http://lists.lugod.org/mailman/listinfo/vox-tech
