Re: Using Vectors in classes - public access

From:

"Daniel T." <daniel_t@earthlink.net>

Newsgroups:

comp.lang.c++.moderated

Date:

Fri, 11 May 2007 21:04:31 CST

Message-ID:

<daniel_t-723450.20275811052007@news.west.earthlink.net>

In article <1178884291.798712.212900@u30g2000hsc.googlegroups.com>,
andrewmorrey@aol.com wrote:

Hello,

I've got a VC++ project containing multiple classes and a main
function. In one of the class functions, it reads from a text file and
places the data into a vector;
//
std::vector<std::vector<std::string> > applications (50,
std::vector<std::string>(12));
applications[colArr][0] = "Test1";
applications[colArr][1] = "Test2";
//
Which works fine for that classes function, however, I need for other
functions of the class, or potentially other classes to be able to
access the applications vector, most likely done through friend-ing
and inheritance.

class foo {
    int a; // 'a' is accessible to every function defined in 'foo'
public:
    void fn1() {
       a = 3;
    }
};

I seem to be unable to get the applications vector to be publicly or
even privately declared inside the main class definition. I've tried
placing the vector definition in both sections, it causes
error C2059: syntax error : 'constant'
when I do.

Where are you using the word "constant"? My guess is it shouldn't be
there at all.

Is there something I'm missing with this?

Thanks,
- Andy

-- Copy of UpdateFileArray.h ---
#ifndef _UPDATEFILEARRAY_H_
#define _UPDATEFILEARRAY_H_

#include <string>
#include <vector>

class UpdateFileArray
{
std::vector<std::vector<std::string> > applications (50,
std::vector<std::string>(12));

You cannot create the object here. Try this:

class UpdateFileArray
{
    std::vector<std::vector<std::string> > applications;
public:
    UpdateFileArray(): applications( 50, 12 ) { }
    void UpdateArray();
    void ArrayLookUp();
    friend class SearchVehicle;
};
extern UpdateFileArray UFA;

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