Add homework-1

2018/alexeymoissenko/hm-1/Pascal-tree.rb

@@ -0,0 +1,45 @@
+class Triangle
+
+  def initialize (base_number, deep) 
+    @base_number = base_number
+    @deep = deep
+  end
+
+  def fact(a)
+    (1..a).reduce(:*)
+  end
+
+  def binomial(n, k)
+    return @base_number if n-k <= 0 || k <= 0
+    fact(n) / (fact(k) * fact(n - k)) * @base_number
+  end
+
+  def curr_str (n)
+    (0..n).map { |e| binomial(n, e) }
+  end
+
+  def show
+    max_row = curr_str(@deep)
+    max_el_size = max_row.max.to_s.size
+    width = [`tput cols`.to_i, 100].max
+    @deep.times do |i|
+      string = curr_str(i).map do |el|
+        el.to_s.center(max_el_size)
+      end.join(" ").center(width)
+      puts "#{i+1}: #{string}"
+    end
+  end
+end
+
+puts 'Введите начальное значение:'
+
+base_number = gets.chomp.to_i
+
+puts 'Введите глубину треугольника:'
+
+deep = gets.chomp.to_i
+
+triangle = Triangle.new(base_number, deep)
+
+triangle.show
+