创建以系统时间为文件名的文件

// time_file.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include "atlstr.h"
#include <stdio.h>
#include <stddef.h>
#include <time.h>
#include <windows.h>
#include <cstring>
using namespace std;

int _tmain(int argc, _TCHAR* argv[])
{
	time_t t;
	t = time(NULL);
	struct tm* ptm;
	ptm = localtime(&t);
	CString strPath;
	CString strDic;
	strDic.Format("%s", "D:\test_pic\");
	strPath.Format("%s_%d%02d%02d%02d%02d%02d%s", "V10", ptm->tm_year+1900, ptm->tm_mon+1, ptm->tm_mday,
		ptm->tm_hour, ptm->tm_min, ptm->tm_sec, ".txt");
	strPath = strDic+strPath;
	//test
	char lpBuffer[1024]= "abcedef";
	int fileReturned = strlen(lpBuffer);
	DWORD FileSaveReturned= 0;

	SECURITY_ATTRIBUTES sa;
	SECURITY_DESCRIPTOR sd;

	InitializeSecurityDescriptor(&sd,SECURITY_DESCRIPTOR_REVISION);
	SetSecurityDescriptorDacl(&sd,TRUE,NULL,FALSE);
	sa.nLength = sizeof(SECURITY_ATTRIBUTES);
	sa.bInheritHandle = TRUE;
	sa.lpSecurityDescriptor = &sd;

	CreateDirectory((LPCTSTR)"D:\test_pic\", &sa );

	HANDLE hFile = CreateFile ( (LPCTSTR)strPath,
		GENERIC_READ | GENERIC_WRITE,
		0,
		NULL,
		CREATE_NEW,
		FILE_ATTRIBUTE_NORMAL,
		NULL  );

	if ( hFile != INVALID_HANDLE_VALUE )
	{
		WriteFile(hFile, lpBuffer, fileReturned, &FileSaveReturned, NULL);
		CloseHandle(hFile);
	}

	return 0;
}

/*

*

*其中CreateFile不能在指定目录下创建文件，用以上源码为例，当无D:\test_pic目录时，CeateFile返回的句柄为空，但是如果有此目录，就能够正常调用。
*所以，应该在CreateFile之间创建D:\test_pic目录。

*注：此源码在VS2010下运行通过。

*

*/