read typedef in binaryfile from cvi 8.0 / conversion from c++

[martin schmal]

// I have problems converting this code into cvi 8.0 - does anyone tried this before? Thanks in advance,

// kind regards, Martin Schmal

//

// working code in c++

#include "stdafx.h"

#include <iostream>

#include <fstream>

#include <cstdlib>

...

typedef struct MeasureHeader
{ 
  unsigned int  MeasureCount;
  char          LackNr[5];
  char          Karosse[3];
  unsigned char Ort;
  char          FileNamePart[19];

} t_MeasureHeader;

...

ifstream file("filname.dat", ios::binary);

file.seekg(0, ios_base::beg);                                                    //jump to begin of file

file.read( ( char* )&head, sizeof(t_MeasureHeader));

cout << head.MeasureCount << " Measuee Count " << head.Karosse << " Karosse Typ"; 

...

[daniel.riedelbauch]

Hi Martin,

the problem is, that LabWindows/CVI is an ANSI C compiler, not a C++ compiler. Have you already heard of Measurement Studio? It's an AddOn for Microsoft VisualStudio. This makes it possible for you to use C++ code as well (but still not within CVI).

Here are three links to the Measurement Studio Editions:

NI Measurement Studio Standard Edition:
http://sine.ni.com/nips/cds/view/p/lang/de/nid/1434

NI Measurement Studio Professional Edition
http://sine.ni.com/nips/cds/view/p/lang/de/nid/1413

NI Measurement Studio Enterprise Edition
http://sine.ni.com/nips/cds/view/p/lang/de/nid/2460

Hope this helps...

Daniel
NIG

[martin schmal]

I finally found a way to read the binaryfile with ansi_c / cvi:

char *DATEI="test.001";  //init

typedef struct MeasureHeader {  
  
  unsigned int MeasureCount;
  char          LackNr[5];
    char          Karosse[3];
    unsigned char Ort;
    char          FileNamePart[19];

  } t_MeasureHeader;

FILE*file=NULL;

DATEI = (char *) malloc(1000); 

 switch (event)
  {
 case EVENT_COMMIT:
  GetProjectDir (&*DATEI);
  if (FileSelectPopup (&*DATEI, "*.001", "", "Data file to load", VAL_LOAD_BUTTON, 0, 0, 1, 0, DATEI) == VAL_NO_FILE_SELECTED)
 return 0;  
   

  file=fopen(DATEI,"rb"); 
  fread(&head,sizeof(t_MeasureHeader),1,file); 
 
  Count=head.MeasureCount;
  Lack=head.LackNr;
  Karo=head.Karosse;
  Ort=head.Ort;
  Dateiname=head.FileNamePart;