カテゴリー: programming

def dividable?(a, b)
# if b != 0
#   if a % b == 0
#   true
# else
#   false
# end
# else
#  false
#  end

  if b != 0 && a % b == 0
  true
  else
  false
  end
end

puts dividable?(10, 2) # true
puts dividable?(10, 3) # false
puts dividable?(10, 0)

def dividable?(a, b)
if a % b == 0
true
else
false
end
end

puts dividable?(10,2) # true
puts dividable?(10,3) #false

def show_ad
puts "---------"
puts "SALE! 50% OFF!"
puts "---------"
end

def show_content
puts "BREAKING NEWS!"
puts "Two baby pandas born at our Zoo!"
end

show_ad
show_content
show_ad

print "Score? "
score = gets.to_i

case score
when 100
  puts "Super"
when 90..89
  puts "A"
when 70...89
  puts "B"
else
  puts"C"
end

require 'date'

class Memo
  attr_accessor :title, :content, :category, :created_at

  def initialize(title, content, category)
    @title = title
    @content = content
    @category = category
    @created_at = DateTime.now
  end

  def to_s
    "#{@title}: #{@content} (Category: #{@category}) [Created at: #{@created_at}]"
  end
end

class MemoApp
  def initialize
    @memos = []
    load_memos
  end

  def run
    loop do
      show_menu
      choice = gets.chomp.to_i

      case choice
      when 1
        create_memo
      when 2
        display_memos
      when 3
        search_memos
      when 4
        break
      else
        puts "Invalid choice. Please try again."
      end
    end
  end

  private

  def show_menu
    puts "\nMemo App Menu"
    puts "1. Create Memo"
    puts "2. Display Memos"
    puts "3. Search Memos"
    puts "4. Exit"
    print "Enter your choice: "
  end

  def create_memo
    print "Enter memo title: "
    title = gets.chomp
    print "Enter memo content: "
    content = gets.chomp
    print "Enter memo category: "
    category = gets.chomp

    memo = Memo.new(title, content, category)
    @memos << memo
    save_memos
    puts "Memo created successfully!"
  end

  def display_memos
    if @memos.empty?
      puts "No memos found."
    else
      puts "\nMemos:"
      @memos.each_with_index do |memo, index|
        puts "#{index + 1}. #{memo}"
      end
    end
  end

  def search_memos
    print "Enter search term: "
    term = gets.chomp.downcase
    results = @memos.select { |memo| memo.title.downcase.include?(term) || memo.content.downcase.include?(term) || memo.category.downcase.include?(term) }
    if results.empty?
      puts "No memos found matching the search term."
    else
      puts "\nSearch Results:"
      results.each { |memo| puts memo }
    end
  end

  def load_memos
    if File.exist?("memos.txt")
      File.open("memos.txt", "r") do |file|
        file.each_line do |line|
          title, content, category, created_at = line.chomp.split(": ")
          @memos << Memo.new(title, content, category)
        end
      end
    end
  end

  def save_memos
    File.open("memos.txt", "w") do |file|
      @memos.each do |memo|
        file.puts "#{memo.title}: #{memo.content}: #{memo.category}: #{memo.created_at}"
      end
    end
  end
end

# メモアプリの実行
memo_app = MemoApp.new
memo_app.run

print "Your name? "
name = gets
puts name[0]
puts name[1]
puts name[2]
name[0] = "*"
name[1] = "*"
name[2] = "*"
puts name

print "Your name? "
name = gets
puts "*" * 10
puts "Hello #{name}"
puts "Hello " + name
puts "*" * 10

#puts 'Hello Taro'
#puts 'Hello Jiro'
#puts "Hello\nSaburo"
name = "Shiro"
puts "Hello #{name}"

price = 150
puts price * 120
puts price * 130
puts price * 140

# price = 151
# price = price + 1
price += 1
#price -= 1
puts price * 120
puts price * 130
puts price * 140