main.lua

--[[----------------------------------------------
			Vocabulary and logic
----------------------------------------------]]--
voc = { 'piedra', 'papel', 'tijeras', 'lagarto', 'spock' }

who	=
    {
        tijeras = { papel   = 'Tijeras cortan papel',
                    lagarto = 'Tijeras decapitan al lagarto'},

        papel   = { piedra  = 'Papel cubre a piedra',
					spock   = 'Papel desautoriza a Spock'},

        piedra  = { lagarto = 'Piedra aplasta a lagarto',
                    tijeras = 'Piedra aplasta las tijeras'},

        lagarto	= { spock   = 'Lagarto envenena a Spock',
                    papel   = 'Lagarto se come el papel'},

        spock   = { tijeras = 'Spock destroza las tijeras',
                    piedra  = 'Spock vaporiza la piedra'}
	}

--[[----------------------------------------------
			Main activity
----------------------------------------------]]--

math.randomseed( os.time() )

print ( 'Choose one: \n' 	..
            '\tPiedra\n' 	..
            '\tPapel\n' 	..
            '\tTijeras\n'	..
            '\tLagarto\n'	..
            '\tSpock' )

user    = string.lower  ( io.read( '*line' ) )
cpu     = math.random   ( 0, 4 )
cpu     = voc [ cpu ]


if user == cpu then
    print 'Empate'
else
    if who [ cpu ][ user ] ~= nil then
        print ( who [ cpu ] [ user ] )
    else
        print ( who [ user ] [ cpu ] )
    end
end

io.read( "*line" )