在线等SYSTEMTIME问题

[atsiang]

SYSTEMTIME stTime1,stTime2;
GetLocalTime(&stTime1);
GetLocalTime(&stTime2);

问题一:
怎么样把&stTime1写入txt文件？
如:
fprintf(log, "%c", stTime1);

问题一:
怎么把两个SYSTEMTIME相减得到分钟数？
stTime2-stTime1

VC6 WIN32

[ArcRain]

typedef struct _SYSTEMTIME {
WORD wYear;
WORD wMonth;
WORD wDayOfWeek;
WORD wDay;
WORD wHour;
WORD wMinute;
WORD wSecond;
WORD wMilliseconds;
} SYSTEMTIME, *PSYSTEMTIME;
SYSTEMTIME是个结构体,要写入文件,把需要的部分进行字符串格式化处理下,再写入文件就好了.
至于相减,估计要自己写个时间处理算法了,没有现成的.

[atsiang]

怎么做呢

[zyq5945]

BOOL SystemTimeToFileTime(
const SYSTEMTIME* lpSystemTime,
LPFILETIME lpFileTime
);
typedef struct _FILETIME {
DWORD dwLowDateTime;
DWORD dwHighDateTime;
} FILETIME, FAR *LPFILETIME;
FILETIME单位是10亿分之100秒

不考虑毫秒的话可以用COleDateTime和COleDateTimeSpan；

[atsiang]

现还有有个问题是
如果stTime1是格林威治标准时间，要把stTime1转成本机时区的时间
不用+8小时的方式，怎么实现

[ljz888666555]

GetSystemTime

[atsiang]

结果值还是SYSTEMTIME

[zyq5945]

SystemTimeToFileTime--》FileTimeToLocalFileTime--》FileTimeToSystemTime

[zyq5945]

GetSystemTime是UTC时间
GetLocalTime是带时区的时间

[tongxu1984]

SYSTEMTIME 的各个字段都是WORD的，你可以分开处理，计算时间，比较简单。
至于写到txt文件中,有个小例子，一个时间记录。
SYSTEMTIME nowtime;
GetLocalTime(&nowtime);//获取系统当前时间
FILE *hr;
hr = fopen(filename,"a");
if (hr == NULL)
{
printf("Open File Error");
}

fprintf(hr, "%4d-%02d-%02d %02d:%02d:%02d\n", nowtime.wYear, nowtime.wMonth, nowtime.wDay, nowtime.wHour, nowtime.wMinute, nowtime.wSecond);
fclose(hr);

[atsiang]

[Quote=引用 7 楼 zyq5945 的回复:]
SystemTimeToFileTime--》FileTimeToLocalFileTime--》FileTimeToSystemTime

[/Quote]

'SystemTimeToFileTime' : cannot convert parameter 1 from 'struct _SYSTEMTIME' to 'const struct _SYSTEMTIME *'

[atsiang]

SystemTimeToFileTime(localSystemTime, &fileTime); //将SYSTEMTIME转换成FILETIME
FileTimeToLocalFileTime(&fileTime, &localFileTime); //将FILETIME转换成Local FILETIME
FileTimeToSystemTime(&localFileTime, &localSystemTime); //将Local FILETIME 转换成SYSTEMTIME

'struct _SYSTEMTIME' to 'const struct _SYSTEMTIME *'

[atsiang]

SYSTEMTIME localSystemTime;
FILETIME fileTime,localFileTime;

::GetSystemTime(&localSystemTime);

SystemTimeToFileTime(localSystemTime, &fileTime);        //将SYSTEMTIME转换成FILETIME
FileTimeToLocalFileTime(&fileTime, &localFileTime);      //将FILETIME转换成Local FILETIME
FileTimeToSystemTime(&localFileTime, &localSystemTime);  //将Local FILETIME 转换成SYSTEMTIME

'struct _SYSTEMTIME' to 'const struct _SYSTEMTIME *'

[ArcRain]

SystemTimeToFileTime(localSystemTime, &fileTime); ->
SystemTimeToFileTime(&localSystemTime, &fileTime);

[animalxu]

还有一个是void GetSystemTime(
LPSYSTEMTIME lpSystemTime
);
这个好像是本时区的时间

[atsiang]

[Quote=引用 13 楼 dream238 的回复:]
SystemTimeToFileTime(localSystemTime, &fileTime); ->
SystemTimeToFileTime(&localSystemTime, &fileTime);
[/Quote]

谢谢