classroom.rb

classroom.rb

class ClassRoom
  def initialize
    @students = []
  end

  def save name, gender
    @students.push(
      { name: name, gender: gender }
    )
  end

  def students
    @students
  end

  def mans
    @students.select { |s| s[:gender] == "man" }
  end

  def womans
    @students.select { |s| s[:gender] == "woman" }
  end
end

room = ClassRoom.new

while true do
  puts "選択してください"
  puts "[0] 生徒を登録"
  puts "[1] 生徒数/割合を取得"
  input = gets.chomp


  if input == "0"
    puts "名前を入力"
    name = gets.chomp

    puts "性別を入力 { man or woman }"
    gender = gets.chomp
    room.save(name, gender)
  end

  if input == "1"
    puts "生徒数は#{room.students.length}人です"
    puts "男子の割合は#{(room.mans.length.to_f / room.students.length) * 100}%です"
    puts "女子の割合は#{(room.womans.length.to_f / room.students.length) * 100}%です"
    break
  end
end