【Ruby 】【閏年問題】西暦の年数および月を入力し、その月の日数を求めよ - Qiita

def get_days(year, month) month_days = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31] #[ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11]列目 if month == 2 if year % 4 == 0 if year % 100 == 0 && year % 400 != 0 days = 28 else days = 29 end else days = 28 end else days = month_days[month - 1] end return days end puts "年を入力してください：" year = gets.to_i puts "月を入力してください：" month = gets.to_i days = get_days(year, mon