测试日期类成员函数，在主函数中列出菜单选项，可以完成日期的加减比较等测试功能。

完善程序功能，在日期相加的菜单选项中增加日期加天数，结果为新日期；日期家月份，结果为新日期，要考虑闰年情况。

　　完善程序功能，在日期相减的菜单选项中增加日期减天数，结果为新日期；日期减月份，结果为新日期，要考虑闰年情况。

显示日期时增加显示星期及英文形式的月份的功能。-　　

Date of Test class member functions, listed in the main function menu options, the date of addition and subtraction can be done comparison testing. Improve the program features, the date the sum of the menu option to add date plus the number of days, the results for the new date　date of the month at home, the result is a new date, leap year to consider the situation. Improve the program functions, date subtraction in the menu option to add the date by days, the results for the new date　date by month, the results for the new date, leap year to consider the situation. Display shows the date when the increase in the weeks and months in English in the form of function.