As written, the function counts weekends, New Year 's day, memorial day, the fourth of July, labor day, Thanksgiving, and Christmas as non - business days.

正如所编写的，这个函数能用来计算周末，新年，纪念日，美国国庆日，劳工节，感恩节，以及圣诞节这些非商业的日期。

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Date class whose member variables are: year, month, day, member functions are: output date function, set the date function, and interpretation of leap year and leap year date plus 1 function function.

详细说明：Date类，其成员变量有：年、月、日，成员函数有：输出日期函数、设置日期函数、判读平年与润年函数和日期加1函数。

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Date class whose member variables are: year, month, day, member functions are: output date function, set the date function, and interpretation of leap year and leap year date plus 1 function function.

详细说明：Date类，其成员变量有：年、月、日，成员函数有：输出日期函数、设置日期函数、判读平年与润年函数和日期加1函数。

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