guess_rand.rb

#!/usr/bin/env ruby

class Guesser
    attr_reader :guess
    def initialize(num)
        @num = num
        @guess = rand num
        @guessq = []
        @guessq.push(@guess)
        printf "I guess %d. \n", @guess
    end
    def reguess(sml)
        loop{
            if sml
                guess_maybe = @guess + rand(10 - @guess)
            else
                guess_maybe = rand @guess
            end
            if @guessq.count(guess_maybe) != 0
                next
            end
            @guessq.push(@guess = guess_maybe)
            break
        }
        printf "Oops! Too #{ sml and "small" or "large" }" + 
               ", I guess %d. \n", @guess
        return @guess
    end
end

loop {
    rnd = rand 10
    puts "Now the random num generated..."
    guesser = Guesser.new 10
    loop {
        printf "Please guess[ 0 -- 9 ]: "
        guess = guesser.guess
        if guess == rnd
            puts "Congratulations! You made it!!"
            break
        end
        guesser.reguess(guess < rnd)
    }
    printf "Continue[Y/N]?"
    if gets =~ /no?/i
        puts "Bye!~"
        break
    end
}