Как определить сколько дней в заданном месяце

← →
Igor_ © (2002-02-25 12:50) [0]

← →
VictorT (2002-02-25 13:00) [1]

Вроде уже недавно было, но всё-таки:

int DaysPerMonth(unsigned short year, unsigned short month)
{
++month;
if (month == 13) {
month = 1;
++year;
}
TDateTime dt = EncodeDate(year, month, 1);
--dt;
unsigned short days;
dt.DecodeDate(&year, &month, &days);
return days;
}

← →
Woron © (2002-02-25 13:17) [2]

from help

function DaysInAMonth(const AYear, AMonth: Word): Word;

Description

Call DaysInAMonth to obtain the number of days in the specified month of the specified year.

AYear is a year between 1 and 9999 (inclusive).

AMonth is a month between 1 and 12 (inclusive).

← →
Woron © (2002-02-25 13:18) [3]

и посмотри еще date/time routines
много интересного найдешь

To Woron:
Какой модуль надо указать в Uses

// (c) RxLib function LeapYear(year: integer): boolean; begin Result := (Year mod 4 = 0) and ((Year mod 100 <> 0) or (Year mod 400 = 0)); end; Function GetDaysInMonth(year,month:integer):integer; const DaysInMonth: array[1..12] of Integer = (31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31); begin Result := DaysInMonth[Month]; if (Month = 2) and LeapYear(Year) then Inc(Result); { leap-year Feb is special } end;

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