在C ++中获得直到月末的秒数

Question

我要求在C ++中获得到月末的时间间隔。是否有任何C ++ API可以轻松地为我做到这一点？

我需要启动一个计时器，它将在下个月的第一天00:00:00到期。为此，我需要计算时间间隔，即从现在到本月底的秒数。

Answer 1

它相当直接的前锋。在{em> now 和当月的最后一天之间获得number of days的差异。然后得到the number of seconds in a day。

现在您已the number of seconds till the end of the month，现在用the number of seconds right now so far today减去the number of seconds until the end of the month，您将获得#include <time.h> #include <iostream> using namespace std; int main(){ int day1,month1,year1; int day2,month2,year2; int i,temp,DaysDiff=0; int month[]={31,28,31,30,31,30,31,31,30,31,30,31}; int totalDiffDaysSecs=0; int nowSeconds=0; int expire=1000; time_t t = time(0); // get time now struct tm * now = localtime( & t ); cout<<"\n"; day1=now->tm_mday; month1=(now->tm_mon + 1); year1=(now->tm_year + 1900); day2=31; month2=7; year2=2015; temp=day1; for(i=month1;i<month2+(year2-year1)*12;i++){ if(i>12){ i=1; year1++; } if(i==2){ if(year1%4==0 && (year1%100!=0 || year1%400==0)) month[i-1]=29; else month[i-1]=28; } DaysDiff=DaysDiff+(month[i-1]-temp); temp=0; } cout <<"Current Time = "<< now->tm_hour << ":" << now->tm_min << "."<<now->tm_sec<<"\n"; cout <<"Today's date "<< (now->tm_year + 1900) << '-' << (now->tm_mon + 1) << '-' << now->tm_mday << " \n"; cout <<"Target date "<< year2 << '-' << month2 << '-' << day2 << " \n"; DaysDiff=DaysDiff+day2-temp; cout<<"Target Month = "<<i<<"\n"; cout<<"Days in Target month = "<<month[i-1]<<"\n"; cout<<"Days diff Today - Target Month = "<<DaysDiff<<" \n"; totalDiffDaysSecs=DaysDiff*24*60*60; nowSeconds= (now->tm_hour * 3600) + (now->tm_min * 60)+ now->tm_sec; cout<<"Total seconds in a day = "<<24*60*60<<" \n"; cout<<"current total seconds so far today = "<< nowSeconds <<"\n"; cout<<"Total number of seconds in "<< DaysDiff <<" days = "<< totalDiffDaysSecs <<"\n"; cout<<"\n\n"; while(expire>0){ t = time(0); // get time now now = localtime( & t ); nowSeconds= (now->tm_hour * 3600) + (now->tm_min * 60)+ now->tm_sec; expire=totalDiffDaysSecs - nowSeconds; cout <<"Seconds until end of month = "<< expire <<" \r"; } cout<<"\n\n"; cout<<"Countdown expired.\n\n"; return 0; } 。

public class DBHelper extends SQLiteOpenHelper {

    public DBHelper(Context context){
        super(context, DATABASE_NAME , null, 1);
    }

    private static final String DATABASE_TABLE_QUOTES = "quotes";


    public void onCreate(SQLiteDatabase db) {



        String CREATE_TABLE_QUOTES = "CREATE TABLE IF NOT EXISTS `" + DATABASE_TABLE_QUOTES + "` (\n" +
        "\t`quote_id`\tINTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,\n" +
        "\t`quote`\tTEXT NOT NULL\n" +
        ");";

        db.execSQL(CREATE_TABLE_QUOTES);


        db.execSQL("INSERT INTO " + DATABASE_TABLE_QUOTES + "VALUES (1, 'test 1')");
        db.execSQL("INSERT INTO " + DATABASE_TABLE_QUOTES + "VALUES (2, 'test 2')");
        db.execSQL("INSERT INTO " + DATABASE_TABLE_QUOTES + "VALUES (3, 'test 3')");
        db.execSQL("INSERT INTO " + DATABASE_TABLE_QUOTES + "VALUES (4, 'test 4')");
        // ........

    }


}