c++ time应用

最新推荐文章于 2025-03-05 21:45:00 发布

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#include <time.h>
//判断两个日期参考： http://bbs.chinaunix.net/thread-1027013-1-1.html
void chekTime()
{
   static time_t oldTime = time(NULL);
   time_t newTime = time(NULL);
   if (oldTime / 86400 != newTime / 86400)
   {
       printf("diffrent day");
   }
   else
   {
       printf("same day");
   }
}

//判断是否是闰年
bool isRunyear(int year)
{
   if (year % 4 == 0 && year % 100 != 0 || year % 400 == 0)
   {
       return true;
   }
   else {
       return false;
   }
}

//获取某年第n天是几月几号

struct MonthDay {

   int Day;
   int month;
};
bool getYearMonth(int year, int day, MonthDay& retYD) {
   int iArr[12] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
   int count = 0, count1 = 0;
   if (isRunyear(year)) //表明是闰年
   {
       iArr[1] = 29;
   }
   for (int i = 0; i < 11; i++)
   {
       count1 = count;
       count += iArr[i];
       if (day >= count1 && day <= count) {
           retYD.month = i + 1;
           retYD.Day = day - count1;
           break;
       }
   }
   return true;
}

//获取某年某月是第几天

int getYearDay(int year, int month, int day)
{
   int sum = 0;
   //计算某月以前月份的天数
   switch (month) {
   case 1:sum = 0;break;
   case 2:sum = 31;break;
   case 3:sum = 59;break;
   case 4:sum = 90;break;
   case 5:sum = 120;break;
   case 6:sum = 151;break;
   case 7:sum = 181;break;
   case 8:sum = 212;break;
   case 9:sum = 243;break;
   case 10:sum = 273;break;
   case 11:sum = 304;break;
   case 12:sum = 334;break;
   default:
       return -1;
       break;
   }
   //月份天数加上这个月的日数
   sum = sum + day;
   if (month>2 && isRunyear(year))sum = sum + 1;
   return sum;
}

//获取某年某月的周期

std::string getWeekstring(const std::string strTime="2018-8-16") //返回08.13~08.19

{
   int year, month, day, hour = 0, minute = 0, second = 0;
   sscanf(strTime.c_str(), "%d-%d-%d %d:%d:%d", &year, &month, &day, &hour, &minute, &second);
   int sumDay = getYearDay(year, month, day);

   int inWeekDay = sumDay % 7;
   int lastWeekDay = sumDay + 7 - inWeekDay;
   if (inWeekDay == 0)
   {
       inWeekDay = 7;
       lastWeekDay = sumDay;
   }
   int headWeekDay = sumDay - inWeekDay + 1;

   std::string retMDstr = "";
   MonthDay td, td2;
   getYearMonth(year, headWeekDay, td);
   getYearMonth(year, lastWeekDay, td2);
   char temp[32];
   sprintf(temp, "%02d.%02d~%02d%02d", td.month, td.Day, td2.month, td2.Day);
   retMDstr = temp;
   return retMDstr;
}

//获取当前时间距离0点还有多少秒

int getToZeroTick()

{

return (86400 - time(NULL)% 86400 - 8 * 3600) > 0 ? 86400 - time(NULL) % 86400 - 8 * 3600 : 86400*2 - time(NULL) % 86400 - 8 * 3600;

}