Thread: how do i compare dates

  1. #1
    Registered User
    Join Date
    Feb 2003

    how do i compare dates

    Hi guys,
    Can anybody help me in knowing the date related functions in C or C++ using win 32.
    I want to compare 2 dates and also do some operations on the date value like adding days and months .
    Kindly help me


  2. #2
    Registered User rmullen3's Avatar
    Join Date
    Nov 2001


    Write a date class, storing month,day,year as ints. ie

    class date
          int m, d, y;
          date() : m(0),d(0),y(0) {}
          date(int M, int D, int Y) : m(M), d(D), y(Y) { }
          date(const date& dt) { m = dt.m; d = dt.d; y = dt.y; }
          int month() const { return m; }
          int day() const { return d; }
          int year() const { return y; }
    Then you could write some operators and, uh... stuff ... =)
    "He who makes a beast of himself, gets rid of the pain of being a man." Dr. Johnson

  3. #3
    Banned master5001's Avatar
    Join Date
    Aug 2001
    Visalia, CA, USA
    Are you using Windows? If so there are some helpful functions to aid the process. Using GetLocalTime() or GetSystemTime() and SystemTimeToFileTime() with FileTimeToSystemTime() can produce accurate dates in the form or 64-bit integers. The one major problem (in C/C++ anyway) is that there is no native support for doing 64-bit math. Your options are assembler or writing a couple of functions for doing some 64-bit addition and subtraction. Either way it is actually much easier than only using a class that maintains the date.

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