sharing struct data throughout program

I have a struct as a private member of my main Window class, like so:

Code:

---

class Window : public QWidget
{
    Q_OBJECT
public:
  //etc
 
private:
  //etc
  struct  Comp  {
 
      short  dataNUM_TOTc;
      char   *lyBuName[24];
      bool   onMA[24];
      short  dataTYPE[24];
    } comp[7];

---

The values of the instances of the struct, comp[0-6], are initialized through a member function of the Window class and determine how my QWidgets are set up. I would like to be able to access (read) the values of this struct in the constructor function of another class, defined in another .cpp file. How to do this?

edit: Actually, I've no reason to make it private, so assume it's public instead of private.

strange: when I add "curCOMP" and "preCOMP" to the struct:

Code:

---

struct  Comp  {
 
 
      short  curCOMP;  //  here
      short  preCOMP;  //  and here
 
 
      short  dataNUM_TOTc;
      char   *lyBuName[24];
      bool   onMA[24];
      short  dataTYPE[24];
 
      //alt
 
    } comp[7];

---

the program crashes. If I change preCOMP from short to int--or if I move both lines below dataTYPE[24] to //alt--it doesn't crash.

What's going on??

Quote:

---

Originally Posted by vonCZ

I would like to be able to access (read) the values of this struct in the constructor function of another class, defined in another .cpp file. How to do this?

edit: Actually, I've no reason to make it private, so assume it's public instead of private.

---

It would be suggested to provide public accessor functions to private data instead of making data itself public. I don't know what's your case but perhaps you could also make accessors and data static (provided that there is always a single Window). This way you wouldn't need a pointer/object to access data.

thanx JPN. Here's what i did based on your advice and looking around a bit on the web: first, I removed the "Comp" struct from the "Window" constructor function (above) and have created a new class in separate files:

dafo.h

Code:

---

#ifndef DAFO_H
#define DAFO_H
 
class Dafo
{
 
  private:
    static short  dataNUM_TOTc;
    //other variables.......
 
  public:
    Dafo();
    ~Dafo();
 
    //GETs 
    static short get_dataNUM_TOTc() { return dataNUM_TOTc; }
 
    //SETs 
    static void  set_dataNUM_TOTc(short value) { dataNUM_TOTc = value; }
 
};
 
#endif

---

I initialize the private variables in dafo.cpp like so:

Code:

---

#include "dafo.h"
 
short Dafo::dataNUM_TOTc = 7;
// other variables
 
Dafo::Dafo(void){
}
 
Dafo::~Dafo(){
 
//  delete this;
 
}

---

...and that's it. Now I can access get/set member functions of Dafo from any class-file which includes: #include "dafo.h"

Anyway, pretty basic C++ I guess, but I thought I would post this in case I've made some obvious C++ programming/protocol mistakes that someone might point out.

thanks again