where to place array initialization?

**Nishant Sivakumar** · Nov 17 '05, 05:27 PM

Re: where to place array initialization?

It's a matter of style I guess.
One option - You could put all your static array members together.

Also note that you don't need to specify "private" for each declaration. One
would do.

private:
static array<String^>^ LHSquestions = gcnew array<String^>{ "question
1","question 2"};
static array<String^>^ RHSquestions = gcnew array<String^>{ "question
1","question 2"};

--
Regards,
Nish [VC++ MVP]

Nish Nishant - Technology & Architecture Leader

http://www.voidnish.com

Nish’s thoughts on technology leadership, cloud architecture, and APIs, among other things

IIS Windows Server

http://blog.voidnish.com

<Geoff Cox> wrote in message
news:luo5g15rec 8gab5hr2vp97tjc k4nsnqtq6@4ax.c om...[color=blue]
> Hello,
>
> I am trying to get a grip on where to place the initialization of two
> arrays in the code below which was created using Visual C++ 2005
> Express Beta 2...
>
> private: static array<String^>^ LHSquestions = gcnew array<String^>
> {"question 1","question 2"};
> private: static array<String^>^ RHSquestions = gcnew array<String^>
> {"question 1",
> "question 2"};
>
> I had assumed that I would add them after the other private lines
> below? Any suggestions for a beginner's Internet tutorial or book on
> using C++ Express language?
>
> Cheers
>
> Geoff
>
>
> !
>
> #pragma once
>
>
> namespace trackbar1
> {
> using namespace System;
> using namespace System::Compone ntModel;
> using namespace System::Collect ions;
> using namespace System::Windows ::Forms;
> using namespace System::Data;
> using namespace System::Drawing ;
>
> /// <summary>
> /// Summary for Form1
> ///
> /// WARNING: If you change the name of this class, you will
> need to change the
> /// 'Resource File Name' property for the managed
> resource compiler tool
> /// associated with all .resx files this class
> depends on. Otherwise,
> /// the designers will not be able to interact
> properly with localized
> /// resources associated with this form.
> /// </summary>
> public ref class Form1 : public System::Windows ::Forms::Form
> {
> public:
> Form1(void)
> {
> InitializeCompo nent();
> //
> //TODO: Add the constructor code here
> //
> }
>
> protected:
> /// <summary>
> /// Clean up any resources being used.
> /// </summary>
> /// <param name="disposing ">"descript ion of the
> parameter"</param>
> virtual void Dispose(Boolean disposing) override
> {
> if (disposing && components)
> {
> delete components;
> }
> __super::Dispos e(disposing);
> }
> private: System::Windows ::Forms::TrackB ar^ trackBar1;
> protected:
> private: System::Windows ::Forms::Pictur eBox^ pictureBox1;
> private: System::Windows ::Forms::Label^ label1;
> private: System::Windows ::Forms::Label^ label2;
> private: System::Windows ::Forms::Button ^ button1;
>
> private:
> /// <summary>
> /// Required designer variable.
> /// </summary>
> System::Compone ntModel::Contai ner ^components;
>
> #pragma region Windows Form Designer generated code
> /// <summary>
> /// Required method for Designer support - do not
> modify
> /// the contents of this method with the code editor.
> /// </summary>
> void InitializeCompo nent(void)
> {
>
> System::Compone ntModel::Compon entResourceMana ger^ resources = (gcnew
> System::Compone ntModel::Compon entResourceMana ger(Form1::type id));
> this->trackBar1 = (gcnew
> System::Windows ::Forms::TrackB ar());
> this->pictureBox1 = (gcnew
> System::Windows ::Forms::Pictur eBox());
> this->label1 = (gcnew
> System::Windows ::Forms::Label( ));
> this->label2 = (gcnew
> System::Windows ::Forms::Label( ));
> this->button1 = (gcnew
> System::Windows ::Forms::Button ());
>
> (cli::safe_cast <System::Compon entModel::ISupp ortInitialize^[color=green]
>>(this->trackBar1))->BeginInit();[/color]
>
> (cli::safe_cast <System::Compon entModel::ISupp ortInitialize^[color=green]
>>(this->pictureBox1) )->BeginInit();[/color]
> this->SuspendLayout( );
> //
> // trackBar1
> //
> this->trackBar1->Location =
> System::Drawing ::Point(90, 168);
> this->trackBar1->Name = L"trackBar1" ;
> this->trackBar1->Size =
> System::Drawing ::Size(104, 45);
> this->trackBar1->TabIndex = 0;
> //
> // pictureBox1
> //
> this->pictureBox1->Image =
> (cli::safe_cast <System::Drawin g::Image^[color=green]
>>(resources->GetObject(L"pi ctureBox1.Image ")));[/color]
> this->pictureBox1->Location =
> System::Drawing ::Point(37, 13);
> this->pictureBox1->Name = L"pictureBox 1";
> this->pictureBox1->Size =
> System::Drawing ::Size(212, 134);
> this->pictureBox1->TabIndex = 1;
> this->pictureBox1->TabStop = false;
> //
> // label1
> //
> this->label1->AutoSize = true;
> this->label1->Location =
> System::Drawing ::Point(27, 182);
> this->label1->Name = L"label1";
> this->label1->Size = System::Drawing ::Size(31,
> 13);
> this->label1->TabIndex = 2;
> this->label1->Text = L"label1";
> //
> // label2
> //
> this->label2->AutoSize = true;
> this->label2->Location =
> System::Drawing ::Point(230, 182);
> this->label2->Name = L"label2";
> this->label2->Size = System::Drawing ::Size(31,
> 13);
> this->label2->TabIndex = 3;
> this->label2->Text = L"label2";
> //
> // button1
> //
> this->button1->Location =
> System::Drawing ::Point(100, 219);
> this->button1->Name = L"button1";
> this->button1->Size =
> System::Drawing ::Size(75, 23);
> this->button1->TabIndex = 4;
> this->button1->Text = L"NEXT";
> //
> // Form1
> //
> this->AutoScaleDimen sions =
> System::Drawing ::SizeF(6, 13);
> this->AutoScaleMod e =
> System::Windows ::Forms::AutoSc aleMode::Font;
> this->ClientSize = System::Drawing ::Size(292,
> 266);
> this->Controls->Add(this->button1);
> this->Controls->Add(this->label2);
> this->Controls->Add(this->label1);
> this->Controls->Add(this->pictureBox1) ;
> this->Controls->Add(this->trackBar1);
> this->Name = L"Form1";
> this->Text = L"Form1";
>
> (cli::safe_cast <System::Compon entModel::ISupp ortInitialize^[color=green]
>>(this->trackBar1))->EndInit();[/color]
>
> (cli::safe_cast <System::Compon entModel::ISupp ortInitialize^[color=green]
>>(this->pictureBox1) )->EndInit();[/color]
> this->ResumeLayout(f alse);
> this->PerformLayout( );
>
> }
> #pragma endregion
> };
> }
>
>
>[/color]

**Geoff Cox** · Nov 17 '05, 05:27 PM

Re: where to place array initialization?

On Wed, 17 Aug 2005 14:31:06 +0530, "Nishant Sivakumar"
<nish@nospam.as ianetindia.com> wrote:
[color=blue]
>It's a matter of style I guess.[/color]

Nish,

Not if you are as much of a C++ beginner as I am! I have found that if
I put them as below the build works. I cannot workout how to
declare/initialize an int called qnumber so that I can have

LHSquestions[qnumber]

How do I do this? Where would I put something like

private: int qnumber = 0;

Cheers

Geoff

#pragma once

namespace trackbar1
{
using namespace System;
using namespace System::Compone ntModel;
using namespace System::Collect ions;
using namespace System::Windows ::Forms;
using namespace System::Data;
using namespace System::Drawing ;

/// <summary>
/// Summary for Form1
///
/// WARNING: If you change the name of this class, you will
need to change the
/// 'Resource File Name' property for the managed
resource compiler tool
/// associated with all .resx files this class
depends on. Otherwise,
/// the designers will not be able to interact
properly with localized
/// resources associated with this form.
/// </summary>
public ref class Form1 : public System::Windows ::Forms::Form
{
public:
Form1(void)
{

InitializeCompo nent();
//
//TODO: Add the constructor code here
//

this->label1->Text = LHSquestions[qnumber];
this->label2->Text = RHSquestions[qnumber];

}

protected:
/// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name="disposing ">"descript ion of the
parameter"</param>
virtual void Dispose(Boolean disposing) override
{
if (disposing && components)
{
delete components;
}
__super::Dispos e(disposing);
}
private: System::Windows ::Forms::TrackB ar^ trackBar1;
protected:
private: System::Windows ::Forms::Pictur eBox^ pictureBox1;
private: System::Windows ::Forms::Label^ label1;
private: System::Windows ::Forms::Label^ label2;
private: System::Windows ::Forms::Button ^ button1;

private: static array<String^>^ LHSquestions = gcnew
array<String^> {"question 1", "question 2"};
private: static array<String^>^ RHSquestions = gcnew
array<String^> {"question 1", "question 2"};

private:
/// <summary>
/// Required designer variable.
/// </summary>
System::Compone ntModel::Contai ner ^components;

#pragma region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not
modify
/// the contents of this method with the code editor.
/// </summary>
void InitializeCompo nent(void)
{

System::Compone ntModel::Compon entResourceMana ger^ resources = (gcnew
System::Compone ntModel::Compon entResourceMana ger(Form1::type id));
this->trackBar1 = (gcnew
System::Windows ::Forms::TrackB ar());
this->pictureBox1 = (gcnew
System::Windows ::Forms::Pictur eBox());
this->label1 = (gcnew
System::Windows ::Forms::Label( ));
this->label2 = (gcnew
System::Windows ::Forms::Label( ));
this->button1 = (gcnew
System::Windows ::Forms::Button ());

(cli::safe_cast <System::Compon entModel::ISupp ortInitialize^[color=blue]
>(this->trackBar1))->BeginInit();[/color]

(cli::safe_cast <System::Compon entModel::ISupp ortInitialize^[color=blue]
>(this->pictureBox1) )->BeginInit();[/color]
this->SuspendLayout( );
//
// trackBar1
//
this->trackBar1->Location =
System::Drawing ::Point(90, 168);
this->trackBar1->Name = L"trackBar1" ;
this->trackBar1->Size =
System::Drawing ::Size(104, 45);
this->trackBar1->TabIndex = 0;
this->trackBar1->Scroll += gcnew
System::EventHa ndler(this, &Form1::trackBa r1_Scroll);
//
// pictureBox1
//
this->pictureBox1->Image =
(cli::safe_cast <System::Drawin g::Image^[color=blue]
>(resources->GetObject(L"pi ctureBox1.Image ")));[/color]
this->pictureBox1->Location =
System::Drawing ::Point(37, 13);
this->pictureBox1->Name = L"pictureBox 1";
this->pictureBox1->Size =
System::Drawing ::Size(212, 134);
this->pictureBox1->TabIndex = 1;
this->pictureBox1->TabStop = false;
//
// label1
//
this->label1->AutoSize = true;
this->label1->Location =
System::Drawing ::Point(27, 182);
this->label1->Name = L"label1";
this->label1->Size = System::Drawing ::Size(31,
13);
this->label1->TabIndex = 2;
this->label1->Text = L"label1";
//
// label2
//
this->label2->AutoSize = true;
this->label2->Location =
System::Drawing ::Point(230, 182);
this->label2->Name = L"label2";
this->label2->Size = System::Drawing ::Size(31,
13);
this->label2->TabIndex = 3;
this->label2->Text = L"label2";
//
// button1
//
this->button1->Location =
System::Drawing ::Point(100, 219);
this->button1->Name = L"button1";
this->button1->Size =
System::Drawing ::Size(75, 23);
this->button1->TabIndex = 4;
this->button1->Text = L"NEXT";
this->button1->Click += gcnew
System::EventHa ndler(this, &Form1::button1 _Click);
//
// Form1
//
this->AutoScaleDimen sions =
System::Drawing ::SizeF(6, 13);
this->AutoScaleMod e =
System::Windows ::Forms::AutoSc aleMode::Font;
this->ClientSize = System::Drawing ::Size(292,
266);
this->Controls->Add(this->button1);
this->Controls->Add(this->label2);
this->Controls->Add(this->label1);
this->Controls->Add(this->pictureBox1) ;
this->Controls->Add(this->trackBar1);
this->Name = L"Form1";
this->Text = L"Form1";
this->Load += gcnew System::EventHa ndler(this,
&Form1::Form1_L oad);

(cli::safe_cast <System::Compon entModel::ISupp ortInitialize^[color=blue]
>(this->trackBar1))->EndInit();[/color]

(cli::safe_cast <System::Compon entModel::ISupp ortInitialize^[color=blue]
>(this->pictureBox1) )->EndInit();[/color]
this->ResumeLayout(f alse);
this->PerformLayout( );

}
#pragma endregion
private: System::Void button1_Click(S ystem::Object^ sender,
System::EventAr gs^ e) {
++qnumber;
this->label1->Text = LHSquestions[qnumber];
this->label2->Text = RHSquestions[qnumber];
}
private: System::Void trackBar1_Scrol l(System::Objec t^ sender,
System::EventAr gs^ e) {
}

private: System::Void Form1_Load(Syst em::Object^ sender,
System::EventAr gs^ e) {
}
};
}

[color=blue]
>One option - You could put all your static array members together.
>
>Also note that you don't need to specify "private" for each declaration. One
>would do.
>
>private:
>static array<String^>^ LHSquestions = gcnew array<String^>{ "question
>1","question 2"};
>static array<String^>^ RHSquestions = gcnew array<String^>{ "question
>1","question 2"};[/color]

**Nishant Sivakumar** · Nov 17 '05, 05:28 PM

Re: where to place array initialization?

> Not if you are as much of a C++ beginner as I am! I have found that if[color=blue]
> I put them as below the build works. I cannot workout how to
> declare/initialize an int called qnumber so that I can have
>
> LHSquestions[qnumber]
>
> How do I do this? Where would I put something like
>
> private: int qnumber = 0;[/color]

You cannot initialize a non-static member. Either make it static (if it
suites your purpose) or use an initialization list.
E.g. :-

ref class Test
{
private:
static int count = 10;
int x;
public:
Test():x(10)
{
}
};

--
Regards,
Nish [VC++ MVP]

Nish Nishant - Technology & Architecture Leader

http://www.voidnish.com

Nish’s thoughts on technology leadership, cloud architecture, and APIs, among other things

IIS Windows Server

http://blog.voidnish.com

<Geoff Cox> wrote in message
news:lov5g15i56 9c20k4jjc4qjgdb f5t665ufi@4ax.c om...[color=blue]
> On Wed, 17 Aug 2005 14:31:06 +0530, "Nishant Sivakumar"
> <nish@nospam.as ianetindia.com> wrote:
>[color=green]
>>It's a matter of style I guess.[/color]
>
> Nish,
>
> Not if you are as much of a C++ beginner as I am! I have found that if
> I put them as below the build works. I cannot workout how to
> declare/initialize an int called qnumber so that I can have
>
> LHSquestions[qnumber]
>
> How do I do this? Where would I put something like
>
> private: int qnumber = 0;
>
> Cheers
>
> Geoff
>
> #pragma once
>
>
> namespace trackbar1
> {
> using namespace System;
> using namespace System::Compone ntModel;
> using namespace System::Collect ions;
> using namespace System::Windows ::Forms;
> using namespace System::Data;
> using namespace System::Drawing ;
>
> /// <summary>
> /// Summary for Form1
> ///
> /// WARNING: If you change the name of this class, you will
> need to change the
> /// 'Resource File Name' property for the managed
> resource compiler tool
> /// associated with all .resx files this class
> depends on. Otherwise,
> /// the designers will not be able to interact
> properly with localized
> /// resources associated with this form.
> /// </summary>
> public ref class Form1 : public System::Windows ::Forms::Form
> {
> public:
> Form1(void)
> {
>
>
> InitializeCompo nent();
> //
> //TODO: Add the constructor code here
> //
>
> this->label1->Text = LHSquestions[qnumber];
> this->label2->Text = RHSquestions[qnumber];
>
>
> }
>
> protected:
> /// <summary>
> /// Clean up any resources being used.
> /// </summary>
> /// <param name="disposing ">"descript ion of the
> parameter"</param>
> virtual void Dispose(Boolean disposing) override
> {
> if (disposing && components)
> {
> delete components;
> }
> __super::Dispos e(disposing);
> }
> private: System::Windows ::Forms::TrackB ar^ trackBar1;
> protected:
> private: System::Windows ::Forms::Pictur eBox^ pictureBox1;
> private: System::Windows ::Forms::Label^ label1;
> private: System::Windows ::Forms::Label^ label2;
> private: System::Windows ::Forms::Button ^ button1;
>
> private: static array<String^>^ LHSquestions = gcnew
> array<String^> {"question 1", "question 2"};
> private: static array<String^>^ RHSquestions = gcnew
> array<String^> {"question 1", "question 2"};
>
>
>
> private:
> /// <summary>
> /// Required designer variable.
> /// </summary>
> System::Compone ntModel::Contai ner ^components;
>
> #pragma region Windows Form Designer generated code
> /// <summary>
> /// Required method for Designer support - do not
> modify
> /// the contents of this method with the code editor.
> /// </summary>
> void InitializeCompo nent(void)
> {
>
> System::Compone ntModel::Compon entResourceMana ger^ resources = (gcnew
> System::Compone ntModel::Compon entResourceMana ger(Form1::type id));
> this->trackBar1 = (gcnew
> System::Windows ::Forms::TrackB ar());
> this->pictureBox1 = (gcnew
> System::Windows ::Forms::Pictur eBox());
> this->label1 = (gcnew
> System::Windows ::Forms::Label( ));
> this->label2 = (gcnew
> System::Windows ::Forms::Label( ));
> this->button1 = (gcnew
> System::Windows ::Forms::Button ());
>
> (cli::safe_cast <System::Compon entModel::ISupp ortInitialize^[color=green]
>>(this->trackBar1))->BeginInit();[/color]
>
> (cli::safe_cast <System::Compon entModel::ISupp ortInitialize^[color=green]
>>(this->pictureBox1) )->BeginInit();[/color]
> this->SuspendLayout( );
> //
> // trackBar1
> //
> this->trackBar1->Location =
> System::Drawing ::Point(90, 168);
> this->trackBar1->Name = L"trackBar1" ;
> this->trackBar1->Size =
> System::Drawing ::Size(104, 45);
> this->trackBar1->TabIndex = 0;
> this->trackBar1->Scroll += gcnew
> System::EventHa ndler(this, &Form1::trackBa r1_Scroll);
> //
> // pictureBox1
> //
> this->pictureBox1->Image =
> (cli::safe_cast <System::Drawin g::Image^[color=green]
>>(resources->GetObject(L"pi ctureBox1.Image ")));[/color]
> this->pictureBox1->Location =
> System::Drawing ::Point(37, 13);
> this->pictureBox1->Name = L"pictureBox 1";
> this->pictureBox1->Size =
> System::Drawing ::Size(212, 134);
> this->pictureBox1->TabIndex = 1;
> this->pictureBox1->TabStop = false;
> //
> // label1
> //
> this->label1->AutoSize = true;
> this->label1->Location =
> System::Drawing ::Point(27, 182);
> this->label1->Name = L"label1";
> this->label1->Size = System::Drawing ::Size(31,
> 13);
> this->label1->TabIndex = 2;
> this->label1->Text = L"label1";
> //
> // label2
> //
> this->label2->AutoSize = true;
> this->label2->Location =
> System::Drawing ::Point(230, 182);
> this->label2->Name = L"label2";
> this->label2->Size = System::Drawing ::Size(31,
> 13);
> this->label2->TabIndex = 3;
> this->label2->Text = L"label2";
> //
> // button1
> //
> this->button1->Location =
> System::Drawing ::Point(100, 219);
> this->button1->Name = L"button1";
> this->button1->Size =
> System::Drawing ::Size(75, 23);
> this->button1->TabIndex = 4;
> this->button1->Text = L"NEXT";
> this->button1->Click += gcnew
> System::EventHa ndler(this, &Form1::button1 _Click);
> //
> // Form1
> //
> this->AutoScaleDimen sions =
> System::Drawing ::SizeF(6, 13);
> this->AutoScaleMod e =
> System::Windows ::Forms::AutoSc aleMode::Font;
> this->ClientSize = System::Drawing ::Size(292,
> 266);
> this->Controls->Add(this->button1);
> this->Controls->Add(this->label2);
> this->Controls->Add(this->label1);
> this->Controls->Add(this->pictureBox1) ;
> this->Controls->Add(this->trackBar1);
> this->Name = L"Form1";
> this->Text = L"Form1";
> this->Load += gcnew System::EventHa ndler(this,
> &Form1::Form1_L oad);
>
> (cli::safe_cast <System::Compon entModel::ISupp ortInitialize^[color=green]
>>(this->trackBar1))->EndInit();[/color]
>
> (cli::safe_cast <System::Compon entModel::ISupp ortInitialize^[color=green]
>>(this->pictureBox1) )->EndInit();[/color]
> this->ResumeLayout(f alse);
> this->PerformLayout( );
>
> }
> #pragma endregion
> private: System::Void button1_Click(S ystem::Object^ sender,
> System::EventAr gs^ e) {
> ++qnumber;
> this->label1->Text = LHSquestions[qnumber];
> this->label2->Text = RHSquestions[qnumber];
> }
> private: System::Void trackBar1_Scrol l(System::Objec t^ sender,
> System::EventAr gs^ e) {
> }
>
> private: System::Void Form1_Load(Syst em::Object^ sender,
> System::EventAr gs^ e) {
> }
> };
> }
>
>
>
>
>
>
>[color=green]
>>One option - You could put all your static array members together.
>>
>>Also note that you don't need to specify "private" for each declaration.
>>One
>>would do.
>>
>>private:
>>static array<String^>^ LHSquestions = gcnew array<String^>{ "question
>>1","questio n 2"};
>>static array<String^>^ RHSquestions = gcnew array<String^>{ "question
>>1","questio n 2"};[/color]
>[/color]

**Geoff Cox** · Nov 17 '05, 05:28 PM

Re: where to place array initialization?

On Wed, 17 Aug 2005 15:06:36 +0530, "Nishant Sivakumar"
<nish@nospam.as ianetindia.com> wrote:
[color=blue]
>You cannot initialize a non-static member. Either make it static (if it
>suites your purpose) or use an initialization list.[/color]

Nish,

Sorry - do not follow. I wish to use the qnumber as the index for the
array so I assume it cannot be static? Some how I need to declare and
initialize the int qnumber - but how?

int qnumber = 0;
LHSquestions[qnumber]

Cheers

Geoff

[color=blue]
>E.g. :-
>
>ref class Test
>{
>private:
> static int count = 10;
> int x;
>public:
> Test():x(10)
> {
> }
>};[/color]

**Tamas Demjen** · Nov 17 '05, 05:28 PM

Re: where to place array initialization?

Geoff Cox wrote:[color=blue]
> Sorry - do not follow. I wish to use the qnumber as the index for the
> array so I assume it cannot be static?[/color]

Only you know that, it's an important design decision. A static member
variable is shared between all instances of the class. If you declare
your variable static, it means every single object will share the same
variable. A have no idea what qnumber is, and whether it should be
shared or not. Technically a static member is not owned by the object
but the class (all objects ever created within the same .exe or .dll).
[color=blue]
> Some how I need to declare and initialize the int qnumber - but how?[/color]

As Nishant has pointed it out before:

ref class Test
{
private:
int qnumber;
public:
Test();
};

Test::Test
: qnumber(0)
{
//[...]
LHSquestions[qnumber]
//[...]
}

Tom

**Geoff Cox** · Nov 17 '05, 05:28 PM

Re: where to place array initialization?

On Wed, 17 Aug 2005 16:14:53 -0700, Tamas Demjen <tdemjen@yahoo. com>
wrote:
[color=blue]
>Only you know that, it's an important design decision. A static member
>variable is shared between all instances of the class. If you declare
>your variable static, it means every single object will share the same
>variable.[/color]

Tamas,

Thanks for above - I had misunderstood static ... incidentally I
thought I had found 2 books on Visual C++ 2005 Express but they are
not due out until October/November - can you suggest any good sites
for Visual C++ 2005 Express language for beginners? So far I have
found C# quite a bit easier to understand but I understand that the
combination of Visual C++ 2005 Express and the Windows SDK allows the
creation of Win32 apps .. so that would be interesting. Back to the
error messages ..

I seem to have the correct code for qnumber, the index for the results
array but am getting a couple of errors which you might underatnd!

line 155 error C2227 left of '->ToString' must point to
class/struct/union/generic type
line 181 error C2228 left of '.Close' must have class/struct/union

I have following for initialization which I think is OK.

private: static array<String^>^ LHSquestions = gcnew array<String^>
{"question 1", "question 2"};

private: static array<String^>^ RHSquestions = gcnew array<String^>
{"question 1", "question 2"};

private: static int qnumber = 0;

private: static array<String^>^ results = gcnew array<String^>
[LHSquestions->Length];

the first error message comes for next line

this->results[qnumber] = trackBar1->Value->ToString(); // line 155

and the second error message for line 188 below

TextWriter^ outfile = gcnew StreamWriter("h :\\a-temp1\\data.txt ");

for (int i=0; i < LHSquestions->Length; i++) {

outfile->WriteLine(resu lts[i]);

}

outfile.Close() ; // line 188

Cheers

Geoff

A have no idea what qnumber is, and whether it should be[color=blue]
>shared or not. Technically a static member is not owned by the object
>but the class (all objects ever created within the same .exe or .dll).
>[color=green]
>> Some how I need to declare and initialize the int qnumber - but how?[/color]
>
>As Nishant has pointed it out before:
>
>ref class Test
>{
>private:
> int qnumber;
>public:
> Test();
>};
>
>Test::Test
> : qnumber(0)
>{
> //[...]
> LHSquestions[qnumber]
> //[...]
>}
>
>Tom[/color]

**Geoff Cox** · Nov 17 '05, 05:28 PM

Re: where to place array initialization?

On Wed, 17 Aug 2005 16:14:53 -0700, Tamas Demjen <tdemjen@yahoo. com>
wrote:

Tam

re my message with the 2 errors - have found the cause of the 2nd one
- I had outfile.Close() instead of outfile->Close()

also found error in the other code but still get 2 similar error
messages

results[qnumber] = trackBar1_Scrol l->Value->ToString();

(I had trackBar1 not trackBar1_Scrol l)

error messages re above

error C2227: left of '->Value' must point to
class/struct/union/generic type
error C2227: left of '->ToString' must point to
class/struct/union/generic type

thoughts?

Cheers

Geoff

**Tamas Demjen** · Nov 17 '05, 05:28 PM

Re: where to place array initialization?

Geoff Cox wrote:
[color=blue]
> Thanks for above - I had misunderstood static ... incidentally I
> thought I had found 2 books on Visual C++ 2005 Express but they are
> not due out until October/November - can you suggest any good sites
> for Visual C++ 2005 Express language for beginners?[/color]

I'm waiting for this book to be published (I don't know when it will be
available):

Amazon.com

http://www.amazon.com/exec/obidos/tg/detail/-/0321174054/qid=1124384460/sr=8-4/ref=sr_8_xs_ap_i1_xgl14/103-2357637-8533432?v=glance&s=books&n=507846

(or)

http://tinyurl.com/b4c3c

The problem is that your questions are not strictly C++/CLI related.
You're trying to learn C++/CLI without a strong C++ background. I don't
know C++/CLI as extensively as C++ -- few people know it inside out,
other than Microsoft engineers. But knowing C++ well certainly helps a
lot. I'm not saying you'll absolutely have to learn C++ before you can
learn C++/CLI, but given the fact that there are no C++/CLI books
available yet, your best bet at this moment is to rely on existing
resources and the draft standard.
[color=blue]
> So far I have
> found C# quite a bit easier to understand[/color]

Difficult problems sometimes can not be addressed efficinetly in a
flexible ways with simple tools. But with .NET you have the advantage of
mixing languages. For example, you may prefer designing the GUI in C#
while writing lower level libraries in C++.
[color=blue]
> line 155 error C2227 left of '->ToString' must point to
> class/struct/union/generic type
> line 181 error C2228 left of '.Close' must have class/struct/union[/color]

try
..ToString()
->Close()

You use -> for pointers and handles. You use . otherwise (value types,
references). I know it may seem confusing first for people coming from
VC, C#, Delphi and similar languages where . applies to handles as well
as value types. In C++ there is a big difference. In fact, with smart
pointers .get() and ->get() have entirely different meaning, you can't
mix them.

Tom

**Tamas Demjen** · Nov 17 '05, 05:28 PM

Re: where to place array initialization?

Tamas Demjen wrote:[color=blue]
> I know it may seem confusing first for people coming from
> VC, ...[/color]

I meant VB not VC.

Tom

**Geoff Cox** · Nov 17 '05, 05:28 PM

Re: where to place array initialization?

On Thu, 18 Aug 2005 10:11:27 -0700, Tamas Demjen <tdemjen@yahoo. com>
wrote:

Tamas

Thanks for your rhoughts. I have made a couple of steps forward in
that I can now create an array with the same number of elements as
there are in another array!

private: static array<String^>^ results = gcnew
array<String^>( otherArray->Length);

although I do not understand the use of the ^ yet!

Also, have been able to access the Scroll value of the trackbar

trackBar1->Value

Another odd one (to me!) in that the entry to the right of the Scroll
Event in Visual C++ 2005 Express Beta 2 is trackBar1_Scrol l so I
thought the value would be

trackBar1_Scrol l->Value

One I have not solved yet is making a button invisible - I thought it
would be

button1->Visible(false) ;

but this does not work! Any ideas?

Cheers

Geoff

[color=blue]
>I'm waiting for this book to be published (I don't know when it will be
>available):
>http://www.amazon.com/exec/obidos/tg...books&n=507846
>(or)
>http://tinyurl.com/b4c3c
>
>The problem is that your questions are not strictly C++/CLI related.
>You're trying to learn C++/CLI without a strong C++ background. I don't
>know C++/CLI as extensively as C++ -- few people know it inside out,
>other than Microsoft engineers. But knowing C++ well certainly helps a
>lot. I'm not saying you'll absolutely have to learn C++ before you can
>learn C++/CLI, but given the fact that there are no C++/CLI books
>available yet, your best bet at this moment is to rely on existing
>resources and the draft standard.
>[color=green]
>> So far I have
>> found C# quite a bit easier to understand[/color]
>
>Difficult problems sometimes can not be addressed efficinetly in a
>flexible ways with simple tools. But with .NET you have the advantage of
>mixing languages. For example, you may prefer designing the GUI in C#
>while writing lower level libraries in C++.
>[color=green]
>> line 155 error C2227 left of '->ToString' must point to
>> class/struct/union/generic type
>> line 181 error C2228 left of '.Close' must have class/struct/union[/color]
>
>try
>.ToString()
>->Close()
>
>You use -> for pointers and handles. You use . otherwise (value types,
>references). I know it may seem confusing first for people coming from
>VC, C#, Delphi and similar languages where . applies to handles as well
>as value types. In C++ there is a big difference. In fact, with smart
>pointers .get() and ->get() have entirely different meaning, you can't
>mix them.
>
>Tom[/color]

**Geoff Cox** · Nov 17 '05, 05:28 PM

Re: where to place array initialization?

On Thu, 18 Aug 2005 08:49:46 +0100, Geoff Cox <> wrote:

[color=blue]
>results[qnumber] = trackBar1_Scrol l->Value->ToString();[/color]

Sorted - it should have been

results[qnumber] = trackBar1->Value.ToString ();

Cheers

Geoff

where to place array initialization?

where to place array initialization?

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