SYSTEMTIME 加了30秒，感觉结果不对，请教
SYSTEMTIME sysnow;
GetLocalTime(&sysnow);

ULARGE_INTEGER fstartdate;/*FILETIME*/

bool irev = SystemTimeToFileTime(&sysnow,(FILETIME*)&fstartdate);
assert(irev);

fstartdate.QuadPart=fstartdate.QuadPart+(30*1000000000/100);

// 100 / 1000000000

SYSTEMTIME t;
irev =FileTimeToSystemTime((FILETIME*)&fstartdate,&t);
assert(irev);


system("pause");


//1纳秒=1000皮秒　
//1纳秒 =0.001 微秒
//1纳秒=0.000 001毫秒 　
//1纳秒=0.000 000 001秒

fstartdate.QuadPart 单位 100纳秒

[解决办法]
30*1000000000溢出int
用30*1000000000ll
[解决办法]

#include <afxdisp.h>
#include <stdio.h>
#include <windows.h>
COleDateTime t;
COleDateTimeSpan h8;
SYSTEMTIME st;
FILETIME ft;
int main(int argc, char **argv) {
    if (argc<2) {
    Usage:
        printf("Usage:%s {hexFILETIME
[解决办法]
\"YYYY-MM-DD hh:mm:ss\"}\n",argv[0]);
        return 2;
    }
    h8=COleDateTimeSpan(0,8,0,0);//8 hours
    if (t.ParseDateTime(argv[1])) {
        t-=h8;
        if (t.GetAsSystemTime(st)) {
            if (SystemTimeToFileTime(&st,&ft)) {
                t+=h8;
                printf("%016I64x <==> %s\n",ft,t.Format("%Y-%m-%d %H:%M:%S"));
                return 1;
            } else { 
 
                printf("SystemTimeToFileTime failed!\n");
                return 3;
            }
        } else {
            printf("GetAsSystemTime failed!\n");
            return 3;
        }
    } else {
        if (1==sscanf(argv[1],"%016I64x",&ft)) {
            t=COleDateTime(ft);
            printf("%016I64x <==> %s\n",ft,t.Format("%Y-%m-%d %H:%M:%S"));
            return 0;
        } else {
            goto Usage;
        }
    }
}

#include <afxdisp.h>
#include <stdio.h>
#include <stdlib.h>
int main() {
    SYSTEMTIME st;
    COleDateTime t;
    COleDateTime b;
    COleDateTimeSpan ts;
    time_t tt;
    COleDateTime n;
    CString s;

    GetSystemTime(&st);
    t=COleDateTime(st);
    b=COleDateTime(1970,1,1,0,0,0);
    ts=t-b;
    tt=(time_t)(ts.GetTotalSeconds());
    n=COleDateTime(tt);
    s=n.Format("%Y-%m-%d %H:%M:%S");
    printf("%s\n",s);
    return 0;
}