# ruby input_test.c

require 'io/console'

puts "Angle( C-c: exit )\n1. 0°\n2. 90°\n3. 180°"

while c = STDIN.getch
  exit if c == ?\C-c
  print c

  puts "\nAngle( C-c: exit )\n1. 0°\n2. 90°\n3. 180°"
end