class Discriminant

# File lib/oops_can.rb, line 5
def self.ask
        puts "For Learn More About Discriminant Follow ENG http://en.wikipedia.org/wiki/Discriminant"
end

# File lib/oops_can.rb, line 9
def self.make
        
        puts "Please input the A: "
        a = gets.to_i
        
        puts "Please input the B: "
        b = gets.to_i

        puts "Please input the C: "
        c = gets.to_i


       d = (b**2) - (4 * a * c )
       puts "Discriminant: #{d}"
       if  d > 0              
               x1 = (b - (d ** 0.5))/(2 * a)
               x2 = (b + (d ** 0.5))/(2 * a)
               puts "x1: #{x1}"
               puts "x2: #{x2}"

               # create graph
               g = Gruff::Dot.new
        g.title = 'Discriminant have 2 dots'
        g.labels = {
          0 => 'x1',
          1 => 'x2',
        }
        g.data(:x1, [x1], '#990000')
        g.data(:x2, [x2], '#990099')
        g.write('Discriminant.png')
        
       elsif d == 0 
               x = (-b )/(2 * a)
               puts "x: #{x}"
               #creating graph
               g= Gruff::Line.new
               g.title = 'Discriminant have 1 dot'
                g.labels = { 0 => 'x' }
                g.data(:x, [x])
                g.write
                
       else

       puts "Not Found X's"
       end
 end