How can I loop versus hardcode?

Posted on 2003-11-18
Last Modified: 2008-02-01
I found and modified a simple C++ program to connect to and create a recordset from a database.  I then write out each record to a text file.  I use the fprintf command and it works fine but I currently have hard-coded in the fprintf line 36 times (see code below) because I don't know how to use a for loop (or something like it).  It would make the code nicer and more professional (at least that's my impression).  Can anyone help?

current code:

#include <stdio.h>
#include <afxdisp.h>

#import "c:\program files\common files\system\ado\msado15.dll" rename ("EOF","adoEOF") no_namespace

#define CREATEiNSTANCE(sp,riid) { HRESULT _hr =sp .CreateInstance( __uuidof( riid ) ); \
                                  if (FAILED(_hr)) _com_issue_error(_hr); }

#define RsITEM(rs,x) rs->Fields->Item[_variant_t(x)]->Value
#define UC (char *)
struct      InitOle {
            InitOle()  { ::CoInitialize(NULL); }
            ~InitOle() { ::CoUninitialize();   }
} _init_InitOle_;       // Global Instance to force load/unload of OLE

void main(){

    _RecordsetPtr   spRS;
    _ConnectionPtr  spCON;
      FILE *fout;
      char csvfile[17] = "pdd_criteria.csv";

      if((fout = fopen(csvfile,"w")) == NULL)
            printf("cannot open out file !\n");
                  // connect to local hmi computer
                  spCON->ConnectionString =L"DRIVER={Microsoft Access Driver (*.mdb)};"
                  // connect to process computer
                  spCON->ConnectionString = L"DSN=tpd;"
                                              L"UID=tpd; PWD=tpdtpd;";
        spCON->Open( "", "", "", -1 );
        spRS->PutRefActiveConnection( spCON );

            spRS->Open("select * from products where bf_max_qty > 0 order by 1 desc", vtMissing, adOpenKeyset, adLockBatchOptimistic, -1);
        while(spRS->adoEOF == false){

            printf("productcode = %s  proddesc = %s \n", UC _bstr_t(RsITEM(spRS,0L)),
                                                 UC _bstr_t(RsITEM(spRS,"bobbintype")));

                        // write string to out file
                        fprintf(fout,"%s,", UC _bstr_t(RsITEM(spRS,0L)));
                        fprintf(fout,"%s,", UC _bstr_t(RsITEM(spRS,1L)));
                        fprintf(fout,"%s,", UC _bstr_t(RsITEM(spRS,2L)));
                        fprintf(fout,"%s,", UC _bstr_t(RsITEM(spRS,3L)));
                        fprintf(fout,"%s,", UC _bstr_t(RsITEM(spRS,4L)));
                        fprintf(fout,"%s,", UC _bstr_t(RsITEM(spRS,5L)));
                        fprintf(fout,"%s,", UC _bstr_t(RsITEM(spRS,6L)));
                        fprintf(fout,"%s,", UC _bstr_t(RsITEM(spRS,7L)));
                        fprintf(fout,"%s,", UC _bstr_t(RsITEM(spRS,8L)));
                        fprintf(fout,"%s,", UC _bstr_t(RsITEM(spRS,9L)));
                        fprintf(fout,"%s,", UC _bstr_t(RsITEM(spRS,10L)));
                        fprintf(fout,"%s,", UC _bstr_t(RsITEM(spRS,11L)));
                        fprintf(fout,"%s,", UC _bstr_t(RsITEM(spRS,12L)));
                        fprintf(fout,"%s,", UC _bstr_t(RsITEM(spRS,13L)));
                        fprintf(fout,"%s,", UC _bstr_t(RsITEM(spRS,14L)));
                        fprintf(fout,"%s,", UC _bstr_t(RsITEM(spRS,15L)));
                        fprintf(fout,"%s,", UC _bstr_t(RsITEM(spRS,16L)));
                        fprintf(fout,"%s,", UC _bstr_t(RsITEM(spRS,17L)));
                        fprintf(fout,"%s,", UC _bstr_t(RsITEM(spRS,18L)));
                        fprintf(fout,"%s,", UC _bstr_t(RsITEM(spRS,19L)));
                        fprintf(fout,"%s,", UC _bstr_t(RsITEM(spRS,20L)));
                        fprintf(fout,"%s,", UC _bstr_t(RsITEM(spRS,21L)));
                        fprintf(fout,"%s,", UC _bstr_t(RsITEM(spRS,22L)));
                        fprintf(fout,"%s,", UC _bstr_t(RsITEM(spRS,23L)));
                        fprintf(fout,"%s,", UC _bstr_t(RsITEM(spRS,24L)));
                        fprintf(fout,"%s,", UC _bstr_t(RsITEM(spRS,25L)));
                        fprintf(fout,"%s,", UC _bstr_t(RsITEM(spRS,26L)));
                        fprintf(fout,"%s,", UC _bstr_t(RsITEM(spRS,27L)));
                        fprintf(fout,"%s,", UC _bstr_t(RsITEM(spRS,28L)));
                        fprintf(fout,"%s,", UC _bstr_t(RsITEM(spRS,29L)));
                        fprintf(fout,"%s,", UC _bstr_t(RsITEM(spRS,30L)));
                        fprintf(fout,"%s,", UC _bstr_t(RsITEM(spRS,31L)));
                        fprintf(fout,"%s,", UC _bstr_t(RsITEM(spRS,32L)));
                        fprintf(fout,"%s,", UC _bstr_t(RsITEM(spRS,33L)));
                        fprintf(fout,"%s,", UC _bstr_t(RsITEM(spRS,34L)));
                        fprintf(fout,"%s, \n", UC _bstr_t(RsITEM(spRS,35L)));


    catch( _com_error &e){
        _bstr_t bstrSource(e.Source());
        _bstr_t bs =  _bstr_t(" Error: ") + _bstr_t(e.Error()) + _bstr_t(" Msg: ")
            + _bstr_t(e.ErrorMessage()) + _bstr_t(" Description: ")
            + _bstr_t(e.Description());
        MessageBox(0,bs,bstrSource, MB_OK);
#undef UC
Question by:fgs3124
  • 2
  • 2
LVL 86

Accepted Solution

jkr earned 500 total points
ID: 9772108
What about

for ( long l = 0; l < 36; ++l) {

    fprintf(fout,"%s, \n", UC _bstr_t(RsITEM(spRS,l)));


Author Comment

ID: 9772705
Sheever-me-timbers . . . it worked!  I tried using the for loop but I must have been doing something wrong.

Thank you.
LVL 86

Expert Comment

ID: 9772729
You are most welcome :o)

Expert Comment

ID: 9777150
you can't just make people rewrite code for u.
or write some new stuff

Author Comment

ID: 9779173
What is that suppose to mean?  This is a help board and I needed help.  I wrote most of the code but got hung up on a piece of it.  That's the very reason this website exists!  I don't suppose the 'Fat' in your userid refers to what resides between your ears . . . ?

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