为什么fclose会出错

[dulvtianya]

TCHAR szTempFile [MAX_PATH];
CString szTempPath="C:\\";
UINT nResult=GetTempFileName (szTempPath, _T ("~ex"),0,szTempFile);


int ret=URLDownloadToFile(NULL,"http://www.ip138.com/ip2city.asp",szTempFile,BINDF_GETNEWESTVERSION,NULL);
if (ret==S_OK) //如果下载成功
{
FILE *f;
f=fopen(szTempFile,"rb");
if(f)
{
fseek(f,0,SEEK_END);//得到文件大小
int ilength=ftell(f);
fseek(f,0,SEEK_SET);

if(ilength>0)
{

char *szIP[32];
ZeroMemory(szIP,sizeof(szIP));
fread(szIP,ilength,1,f);
fclose(f); //这个地方会导致程序错误关闭
//DeleteFile("ip.ini");
CString csIp;
csIp.Format("外网IP：%s",szIP);

//SetDlgItemText(IDC_EDIT_IP,csIp);
//fclose(f);
return csIp;

}
}

}
else
//SetDlgItemText(IDC_EDIT_IP,"Error!");
return "ERROR";

[bohut]

char *szIP[32]; //?????????
------------
改成：char *pBuf = new char[ilength+1];
记得最后
if(pBuf)
{
delete pBuf;
pBuf = null;
}

[pady_pady]

szIP是一个二级指针,大小为四字节,你这样读不溢出了?

[dulvtianya]

[Quote=引用 1 楼 bohut 的回复:]
char *szIP[32];  //?????????
------------
改成：char *pBuf = new char[ilength+1];
记得最后
if(pBuf)
{
  delete pBuf;
  pBuf = null;
}
[/Quote]
改了还是不好用，是fclose(f);出错，

[pady_pady]

在close加fflush(f)试试

[gg606]

//char *szIP[32]; //这里为什么要用指针数组？这真是你想要的吗？
char szIP[32]; //你要的是这个吧？
ZeroMemory(szIP,sizeof(szIP));
fread(szIP,ilength,1,f);
fclose(f);

[Kalivn]

	TCHAR szTempFile [MAX_PATH]; 
	CString szTempPath("C:\\"); 
	CString sztemp("http://www.ip138.com/ip2city.asp");
	UINT nResult=GetTempFileName (szTempPath, _T ("~ex"),0,szTempFile); 
	int ret=URLDownloadToFile(NULL,sztemp,szTempFile,BINDF_GETNEWESTVERSION,NULL); 
	if (ret==S_OK) //如果下载成功 
	{ 
		FILE *f; 
		f=fopen((char*)szTempFile,"rb"); 
		if(f) 
		{ 
			fseek(f,0,SEEK_END);//得到文件大小 
			int ilength=ftell(f); 
			fseek(f,0,SEEK_SET); 
			if(ilength>0) 
			{  

				char *szIP = new char[ilength+1]; 
				ZeroMemory(szIP,sizeof(szIP)); 
				fread(szIP,ilength,1,f); 
				fclose(f);  //这个地方会导致程序错误关闭 
				delete [] szIP;
				//DeleteFile("ip.ini"); 
			}
		}
	}

改好了，试下吧~

[hahanibc]

TCHAR szTempFile [MAX_PATH];
CString szTempPath="C:\\";
UINT nResult=GetTempFileName (szTempPath, _T ("~ex"),0,szTempFile);


int ret=URLDownloadToFile(NULL,"http://www.ip138.com/ip2city.asp",szTempFile,BINDF_GETNEWESTVERSION,NULL);
if (ret==S_OK) //如果下载成功
{
FILE *f;
f=fopen(szTempFile,"rb");
if(f)
{
fseek(f,0,SEEK_END);//得到文件大小
int ilength=ftell(f);
fseek(f,0,SEEK_SET);

if(ilength>0)
{ 

char *szIP[32];
ZeroMemory(szIP,sizeof(szIP));
fread(szIP,ilength,1,f);
fclose(f);  //这个地方会导致程序错误关闭
//DeleteFile("ip.ini");
CString csIp;
csIp.Format("外网IP：%s",szIP);

//SetDlgItemText(IDC_EDIT_IP,csIp);
//fclose(f);
return csIp;

}
}

}
else
//SetDlgItemText(IDC_EDIT_IP,"Error!");
return "ERROR";