关于 !define /date

本文详细介绍了NSIS日期插件中各种日期格式符号的含义及应用,包括日期、时间、星期、月份等元素的表示方法,为开发者提供了一站式的日期格式解析指南。

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  Details of  !define /date
     %a    abbreviated weekday name (Sun)
     %A    full weekday name (Sunday)
     %b    abbreviated month name (Dec)
     %B    full month name (December)
     %c    date and time (Dec  2 06:55:15 1979)
     %d    day of the month (02)
     %H    hour of the 24-hour day (06)
     %I    hour of the 12-hour day (06)
     %j    day of the year, from 001 (335)
     %m    month of the year, from 01 (12)
     %M    minutes after the hour (55)
     %p    AM/PM indicator (AM)
     %S    seconds after the minute (15)
     %U    Sunday week of the year, from 00 (48)
     %w    day of the week, from 0 for Sunday (6)
     %W    Monday week of the year, from 00 (47)
     %x    date (Dec  2 1979)
     %X    time (06:55:15)
     %y    year of the century, from 00 (79)
     %Y    year (1979)
     %Z    time zone name, if any (EST)
     %%    percent character %

Ref:
http://nsis.sourceforge.net/NSIS-Date_plug-in

以下是基于你提供的类定义的C++代码: ``` #include <iostream> #include "Date.h" using std::ostream; // Define static member days. const int Date::days[] = { 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }; // Constructor: initialize month, day, year. Date::Date(int m, int d, int y) { setDate(m, d, y); } // Set the date. void Date::setDate(int m, int d, int y) { month = (m >= 1 && m <= 12) ? m : 1; year = (y >= 1900 && y <= 2100) ? y : 1900; // Test for a leap year. if (month == 2 && leapYear(year)) day = (d >= 1 && d <= 29) ? d : 1; else day = (d >= 1 && d <= days[month]) ? d : 1; } // Prefix increment operator. Date& Date::operator++() { helpIncrement(); return *this; } // Postfix increment operator. Date Date::operator++(int) { Date temp = *this; helpIncrement(); return temp; } // Add days to the date. const Date& Date::operator+=(int additionalDays) { for (int i = 0; i < additionalDays; i++) helpIncrement(); return *this; } // Determine if the year is a leap year. bool Date::leapYear(int testYear) const { if (testYear % 400 == 0 || (testYear % 100 != 0 && testYear % 4 == 0)) return true; else return false; } // Determine if the date is at the end of the month. bool Date::endOfMonth(int testDay) const { if (month == 2 && leapYear(year)) return testDay == 29; else return testDay == days[month]; } // Utility function to increment the date. void Date::helpIncrement() { if (!endOfMonth(day)) day++; else { if (month < 12) month++; else { month = 1; year++; } day = 1; } } // Overloaded stream insertion operator. ostream& operator<<(ostream& output, const Date& d) { static char* monthName[13] = { "", "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" }; output << monthName[d.month] << ' ' << d.day << ", " << d.year; return output; } ``` 可以在代码中添加其他函数和运算符的实现以满足你的需求。
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