practice.rb

#!/usr/bin/ruby
#use like this:
#$ practice.rb file.txt 50
class Entry
    def initialize(line)
        if line =~ /:/
            arr = line.split ":"
        else
            arr = line.split " ";
        end
        @question = arr.shift;
        @answers = arr.join " ";
    end
    def check(ans)
        ans.chomp!;
        return false if(ans == "");
        @answers.include? ans;
    end
    def ask
        print @question," ";
    end
    def ans
        @answers;
    end
end

class Test
    def initialize(file)
        @entries=[]
        import(file)
    end
    def import(file)
        file.each do |line|
            @entries.push Entry.new(line);
        end
    end
    def test(n)
        count = n;
        score = 0;
        while n > 0
            entry = @entries[rand(@entries.size)];
            entry.ask;
            if entry.check(STDIN.gets)
                score += 1;
                print "ok #{entry.ans}\n";
            else
                print "no #{entry.ans}\n";
            end
            n -= 1;
        end
        mesg = "#{ARGV[0]} #{ARGV[1]}: #{score}/#{count} = #{score.to_f / count.to_f * 100.0}%\n";
        print mesg
        File.open("practicelog","a") { |logfile|
            logfile.puts mesg;
        }
    end
end
n=ARGV[1].to_i
test=Test.new(File.open(ARGV[0]))
test.test(n)