用CFile::Write如何控制写入文件的格式？在线急等

[kingsoft_]

CTime t;
t=CTime::GetCurrentTime();
CFile file("D:\\rtdata.txt",CFile::modeCreate | CFile::modeWrite);
time_str.Format("0000000,%d-%d-%d %d:%d:%d,0007,1,0,0",t.GetYear(),t.GetMonth(),t.GetDay(),t.GetHour(),t.GetMinute(),t.GetSecond());
file.Write(time_str,strlen(time_str));
我想每写入一次系统时间后换行该如何实现？

[ww012]

CStdioFile dataStore;
dataStore.WriteString("\n");

[trazan]

\r\n

[sodangerous]

CTime t;
t=CTime::GetCurrentTime();
CFile file;
if(!file.Open("D:\\rtdata.txt",CFile::modeWrite))
{
if(!file.Open("D:\\rtdata.txt",CFile::modeCreate ))
{
//print error
}
}
time_str.Format("0000000,%d-%d-%d %d:%d:%d,0007,1,0,0",t.GetYear(),t.GetMonth(),t.GetDay(),t.GetHour(),t.GetMinute(),t.GetSecond());
file.SeekToEnd();
file.Write(time_str,strlen(time_str));
file.Close();

[sodangerous]

CTime t;
t=CTime::GetCurrentTime();
CFile file;
if(!file.Open("D:\\rtdata.txt",CFile::modeWrite))
{
if(!file.Open("D:\\rtdata.txt",CFile::modeCreate ))
{
//print error
}
}
time_str.Format("0000000,%d-%d-%d %d:%d:%d,0007,1,0,0",t.GetYear(),t.GetMonth(),t.GetDay(),t.GetHour(),t.GetMinute(),t.GetSecond());
file.SeekToEnd();
file.Write(time_str,strlen(time_str));
file.Write("\r\n",2);
file.Close();

[bobob]

time_str.Format("0000000,%d-%d-%d %d:%d:%d,0007,1,0,0",t.GetYear(),t.GetMonth(),t.GetDay(),t.GetHour(),t.GetMinute(),t.GetSecond());
=================>
time_str.Format("0000000,%d-%d-%d %d:%d:%d,0007,1,0,0\r\n",t.GetYear(),t.GetMonth(),t.GetDay(),t.GetHour(),t.GetMinute(),t.GetSecond());