year = int(input("请输入年份: ")) month = int(input("请输入月份: "))if month in [1, 3, 5, 7, 8, 10, 12]:days = 31 elif month in [4, 6, 9, 11]:days = 30 elif month == 2:if (year % 4 == 0 and year % 100 != 0) or (year % 400 == 0):days = 29else:days = 28 else:print("输入的月份不合法")days = Noneif days is not None:print(f"{year}年{month}月有{days}天")
