#include <windows.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <ATLComTime.h>

#pragma once

#pragma warning(disable:4996)

int CompareSystemTime(SYSTEMTIME &stStart, SYSTEMTIME &stEnd)

{//获取两个    SYSTEMTIME的日期之差

    COleDateTime m_tStartDate;

    COleDateTime m_tEndDate;

    m_tStartDate.SetDate(stStart.wYear, stStart.wMonth, stStart.wDay);

    m_tEndDate.SetDate(stEnd.wYear, stEnd.wMonth, stEnd.wDay);

    COleDateTimeSpan nDays = m_tEndDate - m_tStartDate;

    return (int)nDays.GetDays();

}

SYSTEMTIME GetDateAdded(SYSTEMTIME &stStart)

{//起始日期增加一天

    COleDateTime m_tStartDate;

    m_tStartDate.SetDate(stStart.wYear, stStart.wMonth, stStart.wDay);

    COleDateTimeSpan ts2();

    m_tStartDate += ts2;

    SYSTEMTIME stTemp;

    stTemp.wYear = m_tStartDate.GetYear();

    stTemp.wMonth = m_tStartDate.GetMonth();

    stTemp.wDay = m_tStartDate.GetDay();

    return stTemp;

}

//主函数

int main(void)

{

    SYSTEMTIME st, st1;

    st.wYear = ;

    st.wMonth = ;

    st.wDay = ;

    GetLocalTime(&st1);

    int nDays = CompareSystemTime(st, st1);

    printf("%d\n", nDays);

    st = GetDateAdded(st);

    printf("%d-%02d-%02d\n", st.wYear, st.wMonth, st.wDay);

    nDays = CompareSystemTime(st, st1);

    printf("%d\n", nDays);

    return ;

}