文本读写 CStdioFile流文件

char   * pFileName = " test.txt " ;
    CStdioFile sf;
     if ( ! sf.Open(pFileName,CFile::modeCreate | CFile::modeReadWrite | CFile::typeText))
    {
#ifdef _DEBUG
        afxDump << " Unable to open file " << " \n " ;
#endif
        exit( 1 );
    }

     char  aaa[] = " aaa\n " ; //         '\n' :0x0A 
     char   * bbb = " bbb\12 " ; //         '\12':0x0A
    CString ccc( " ccc\15 " ); //     '\15':0x0D
    
    sf.WriteString(aaa);
    sf.WriteString(bbb);
    sf.WriteString(ccc);
    sf.WriteString( " ddd\r " ); //     '\r' :0x0D

    sf.Close();

    CStdioFile sf2( " test.txt " ,CFile::modeRead | CFile::typeText);
     char  buf[ 8 ];
    CString str;
    LPTSTR lpstr = sf2.ReadString(buf, 8 );
    AfxMessageBox(buf);
     while (sf2.ReadString(str))
        AfxMessageBox(str);
    sf2.Close();