C / C++ / MFC

void CTestDlg::OnBgo() 
{
	UpdateData();
	CWaitCursor wait;
	if(m_csFilename.IsEmpty()){
		AfxMessageBox(_T("Please specify the file to parse"));
		return;
	}
	CFile f;

	//let's open file and read it into CString (u can use any buffer to read though
	if (f.Open(m_csFilename, CFile::modeRead|CFile::shareDenyNone)) {
		m_wndLinksList.ResetContent();
		CString csWholeFile;
		f.Read(csWholeFile.GetBuffer(f.GetLength()), f.GetLength());
		csWholeFile.ReleaseBuffer(f.GetLength());
		f.Close();

		//declare our MSHTML variables and create a document
		MSHTML::IHTMLDocument2Ptr pDoc;
		MSHTML::IHTMLDocument3Ptr pDoc3;
		MSHTML::IHTMLElementCollectionPtr pCollection;
		MSHTML::IHTMLElementPtr pElement;

		HRESULT hr = CoCreateInstance(CLSID_HTMLDocument, NULL, CLSCTX_INPROC_SERVER, 
			IID_IHTMLDocument2, (void**)&pDoc);
		
		//put the code into SAFEARRAY and write it into document
		SAFEARRAY* psa = SafeArrayCreateVector(VT_VARIANT, 0, 1);
		VARIANT *param;
		bstr_t bsData = (LPCTSTR)csWholeFile;
		hr = SafeArrayAccessData(psa, (LPVOID*)&param);
		param->vt = VT_BSTR;
		param->bstrVal = (BSTR)bsData;
		
		hr = pDoc->write(psa);
		hr = pDoc->close();
		
		SafeArrayDestroy(psa);

		//I'll use IHTMLDocument3 to retrieve tags. Note it is available only in IE5+
		//If you don't want to use it, u can just run through all tags in HTML
		//(IHTMLDocument2->all property)
		pDoc3 = pDoc;
		
		//display HREF parameter of every link (A tag) in ListBox
		pCollection = pDoc3->getElementsByTagName(L"A");
		for(long i=0; i<pCollection->length; i++){
			pElement = pCollection->item(i, (long)0);
			if(pElement != NULL){
				//second parameter says that you want to get text inside attribute as is
				m_wndLinksList.AddString((LPCTSTR)bstr_t(pElement->getAttribute("href", 2)));
			}
		}
	}
}

#include <stdio.h>;

int main(void)
{

    FILE *leer_datos, *escribir_datos;
    char muestra[50];

	leer_datos = fopen("input_file.txt", "rt"); 
    escribir_datos = fopen("output_file.txt", "wt");

	while ( (!feof(leer_datos)) && (!ferror(leer_datos)) ) 

	{
		muestra = getc(leer_datos) ;
		if (muestra == '|')  
		     {
			  fgets(muestra, sizeof(muestra), leer_datos); 
              fputs(muestra, escribir_datos);
			  fputs("\n", escribir_datos);
		     }
	
   
	}

	if (fclose(leer_datos) != 0)
		printf ("Hay problemas al cerrar el fichero de lectura de datos\n");  

    if (fclose(escribir_datos) != 0)
		printf ("Hay problemas al cerrar el fichero de escritura de datos\n");    

}