terrain.dat

10
6 1 3 4 5 0 7 3 1 9
8 1 3 4 5 9 7 2 9 2
3 2 8 4 5 1 7 1 6 3
1 9 3 4 5 6 7 9 5 3
2 7 4 4 5 2 7 0 2 1
6 2 9 4 5 7 7 7 3 2
9 5 1 4 5 3 7 0 0 0
6 2 3 4 5 5 7 0 0 0
1 2 2 4 5 7 7 0 0 0
1 2 8 4 5 9 7 4 5 8

terrain.rb

class Terrain
  attr_reader :coordinates, :matrix_size

  def initialize (x)
    first_line = true;
    input = File.open(x, File::RDONLY){|f| f.read }
    @coordinates = input.lines.map{ |l| l.split.map(&:to_i) }
    @matrix_size = coordinates[0][0]
    @coordinates.shift
  end

  def get_average
    sum = 0;
    coordinates.each do |line|
      line.each do |element|
        sum += element
      end
    end
    average = (sum.to_f / (matrix_size * matrix_size))
    puts average
  end
  
  def get_lowest
    lowest = coordinates[0][0]
    x = 0
    y = 0
    x_temp = 0
    y_temp = 0

    coordinates.each do |line|
      line.each do |element|
        if lowest > element then
          x = x_temp
          y = y_temp
          puts element
          y_temp += 1
        end
      end
      x_temp += 1
      y_temp = 0
    end

    puts "Lowest altitude coordinates: X: #{x}, Y: #{y}"
  end


end

object = Terrain.new("terrain.dat")
object.get_average
object.get_lowest