Re: What is wrong with this template? - C / C++ / MFC Discussion Boards

Anonymous25-Dec-04 10:53

25-Dec-04 10:53

This time I don't want to ask you guys for help, but I like to give you an advise. BELIEVE IN YOURSELF, THAT'S THE ONLY WAY TO ACHIEVE WHAT YOU WANT.

A few months ago I asked here a question about a problem I had during debugging my own written application. And there was somebody tried to insult me by saying that, what I was doing, it was too complex for me. Actually I didn't like his answer Mad | :mad:

, I had the feeling he's a selfish person Unsure | :~

. So I continued my search for a solution of my problem and finally I found it.
Now my application (for client/server chat) is working well, I like to share my experience with you that you have to believe in your capability. Don't let other people destroy your dream. Cool | :cool:

And I also want to thank other programmers here who make time free to answer questions. Rose | [Rose]

Greetz Nordin from Holland.

Re: Believe in yourself?

alex.barylski25-Dec-04 14:45

alex.barylski

25-Dec-04 14:45

This is soapbox/lounge material Big Grin | :-D

Secondly...

The response you got was probably due to you asking a vague question...

Like:

I'm using a CListCtrl and I can't add items...

When I read questions like that I answer with...

Your probably not experienced enough...go back to using VB. If your too lazy to narrow your problem to something more specific, then I assume it's laziness or inexperience in debugging...

You are right about believing in yourself...thats key to success...so instead of asking a question the minute something goes wrong, have faith in yourself and narrow your problem down until you either solve it or it's specific enough someone knows whats going on and it can be answered.

I'm sure many of us are guilty of jumping the gun and posting a question before we even try to solve it (myself included) but atthe same time you can't be mad when someone gets disappointed by your lack of interest in your own source code...and makes a comment like...your a beginner or whatever...

Just my 2 cents...

It's frustrating being a genius and living the life of a moron!!!

Re: Believe in yourself?

John R. Shaw26-Dec-04 12:59

John R. Shaw

26-Dec-04 12:59

:-DGood answer!

Confused | :confused:

Question: Why does this not work?
"char *ch; ch = 'a';"

D'Oh! | :doh:

Answer: Because you do not know what you are doing!

Wink | ;)

At least that is what I feel like saying.

Usualy I try to solve the problem myself. So that by the time I do ask a question there are very few peaple who can answer it.

Once in a while I'll ask a question while in the middle of researching for the answer, in hopes that I can short cut my research a little.

INTP
"The more help VB provides VB programmers, the more miserable your life as a C++ programmer becomes."
Andrew W. Troelsen

Re: Believe in yourself?

Henry miller27-Dec-04 3:45

Henry miller

27-Dec-04 3:45

I generally reply like that because I want to scare you. You are over your head when you ask some questions, and you have two choices. Giving an answer your your question is the wrong thing to do, because you need to learn to research this on your own (often for other useful information you will learn while finding the answer).

Your first choice when this happens is to push on through, believe in yourself, and just solve it no matter how hard it is. It will take time and effort, but you become a better person for it.

The other choice is to give up. This takes no effort, but it doesn't waste your time, nor does it waste our when when you hit the next road block (should we answer the question) that you can't solve. For most people this is the right thing to do, simply because they will give up eventially anyway.

You are one of the rare people who fall into the first catagory. Now take a step back, would you have learned as much about the problem if we gave you all the answers? Could you even have solved it? My guess is you learned a lot along the way, much of which is important, but not something you would have thought to ask.

m_pMainWnd in a multi-dialog based app

Penguen Efendi25-Dec-04 10:14

Penguen Efendi

25-Dec-04 10:14

Hi!

i got a dialog based app project which makes use of multiple dialog windows. in the main app source file (~MyApp.cpp) there is a line m_pMainWnd=&dMyDia;. when only one dialog is used, there is no problem but in my project, user is to do the work by some steps, meaning some dialog windows (like an installation process). so, when the first dialog closes and the other opens, OS says it's an illegal operation etc and my app crashes. when i remove the mentioned line, app seems ok for some "another dialog"s, but crashes on "another dialog" after a while. what should i do?

another question is, in HH_POPUP structure (for poping a little window, only help text in it), there is pszFont value that points a string to change the text font. MSDN says, string must in format facename[, point size[, charset[ BOLD ITALIC UNDERLINE]]]. so, the string must be something like "MS Sans Serif, 10, , BOLD". it is ok but what to write for charset in that string if i want to change the charset? what words can be written in there? is there a list?

thanks a lot Smile | :)

What is wrong with this template?

sacoskun25-Dec-04 8:32

sacoskun

25-Dec-04 8:32

StackA.h

#ifndef STACKA_H<br />
#define STACKA_H<br />
// *********************************************************<br />
// Header file StackA.h for the ADT stack.<br />
// Array-based implementation.<br />
// *********************************************************<br />
#include "StackException.h"<br />
#include <new><br />
const int MAX_STACK = 100;<br />
<br />
template < class StackItemType ><br />
<br />
class Stack<br />
{<br />
public:<br />
// constructors and destructor:<br />
   Stack();  // default constructor<br />
<br />
// stack operations:<br />
   bool isEmpty() const;<br />
   void push(StackItemType newItem) throw(StackException);<br />
   void pop() throw(StackException);<br />
   void pop(StackItemType& stackTop) throw(StackException);<br />
   void getTop(StackItemType& stackTop) const<br />
           throw(StackException);<br />
<br />
private:<br />
   StackItemType items[MAX_STACK];  // array of stack items<br />
   int           top;               // index to top of stack<br />
};  // end class<br />
<br />
#endif

StackA.cpp

// *********************************************************<br />
// Implementation file StackA.cpp for the ADT stack.<br />
// Array-based implementation.<br />
// *********************************************************<br />
#include "StackA.h"  // Stack class specification file<br />
#include "StackException.h"<br />
<br />
template < class StackItemType ><br />
Stack<StackItemType>::Stack(): top(-1)<br />
{<br />
}  // end default constructor<br />
<br />
template < class StackItemType ><br />
bool Stack<StackItemType>::isEmpty() const<br />
{<br />
   return top < 0;<br />
}  // end isEmpty<br />
<br />
template < class StackItemType ><br />
void Stack<StackItemType>::push(StackItemType newItem) throw(StackException)<br />
{<br />
// if stack has no more room for another item<br />
   if (top >= MAX_STACK-1)<br />
      throw StackException("StackException: stack full on push");<br />
   else<br />
   {  ++top;<br />
      items[top] = newItem;<br />
   }  // end if<br />
}  // end push<br />
<br />
template < class StackItemType ><br />
void Stack<StackItemType>::pop() throw(StackException)<br />
{<br />
   if (isEmpty())<br />
      throw StackException("StackException: stack empty on pop");<br />
   else<br />
      --top;     // stack is not empty; pop top<br />
}  // end pop<br />
<br />
template < class StackItemType ><br />
void Stack<StackItemType>::pop(StackItemType& stackTop) throw(StackException)<br />
{<br />
   if (isEmpty())<br />
      throw StackException("StackException: stack empty on pop");<br />
   else<br />
   {  // stack is not empty; retrieve top<br />
      stackTop = items[top];<br />
      --top;     // pop top<br />
   }  // end if<br />
}  // end pop<br />
<br />
template < class StackItemType ><br />
void Stack<StackItemType>::getTop(StackItemType& stackTop) const throw(StackException)<br />
{<br />
   if (isEmpty())<br />
      throw StackException("StackException: stack empty on getTop");<br />
   else<br />
      // stack is not empty; retrieve top<br />
      stackTop = items[top];<br />
}  // end getTop<br />
// End of implementation file.

in main function of a driver class,

Stack< char > myStack;

The Visual Studio 2005 compiler gives me 6 errors that I cannot understand anything from them.
Here some of them;

Error 22 error LNK2019: unresolved external symbol "public: bool __thiscall Stack<char>::isEmpty(void)const " (?isEmpty@?$Stack@D@@QBE_NXZ) referenced in function "class std::basic_string<char,struct std::char_traits<char="">,class std::allocator<char> > __cdecl convertInfixToPostfix(class std::basic_string<char,struct std::char_traits<char="">,class std::allocator<char> >)" (?convertInfixToPostfix@@YA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@V12@@Z) InfixCalculator

Error 23 error LNK2019: unresolved external symbol "public: void __thiscall Stack<char>::pop(void)" (?pop@?$Stack@D@@QAEXXZ) referenced in function "class std::basic_string<char,struct std::char_traits<char="">,class std::allocator<char> > __cdecl convertInfixToPostfix(class std::basic_string<char,struct std::char_traits<char="">,class std::allocator<char> >)" (?convertInfixToPostfix@@YA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@V12@@Z) InfixCalculator

Error 27 fatal error LNK1120: 5 unresolved externals InfixCalculator

Any help would be appriciated,
Thanks in advance.

Re: What is wrong with this template?

C^hris L^osinger26-Dec-04 3:52

C^hris L^osinger

26-Dec-04 3:52

this might help[^]

Software | Cleek

Re: What is wrong with this template?

John R. Shaw26-Dec-04 13:13

John R. Shaw

26-Dec-04 13:13

All those template functions (in StackA.cpp) used by the templated class must be in the header file not in a seperate CPP file. Otherwise the compiler only has the prototypes for functions it has not generated. Therefore, you will get "unresolved external...", because they do not exist.

INTP
"The more help VB provides VB programmers, the more miserable your life as a C++ programmer becomes."
Andrew W. Troelsen

How to use SetTimer( ) when I create MFC Regular Dll?

tttyip25-Dec-04 6:13

tttyip

25-Dec-04 6:13

I've created a MFC Dll, however, when I use the SetTimer function in the Dll, the external application gets error assertions.

Here is my use of the MFC Dll:
DLLClass::void Test()
{
SetTimer(1000, 5000, NULL);
}

DllClass::OnTimer(.....)
{
.....do something when the timer message arrives
}

Here is my external application:

DllClass myclass;
ExtClass::SetMyTimer()
{
myclass.Test;
}

When I call the SetMyTimer function, I got error, how should I do if I want to use SetTimer Function in the MFC Dll?

thanks

Re: How to use SetTimer( ) when I create MFC Regular Dll?

Ravi Bhavnani25-Dec-04 6:32

Ravi Bhavnani

25-Dec-04 6:32

SetTimer() is a method of the CWnd class. Your usage of the function invokes the globally scoped ::SetTimer() Windows API call which takes a window handle as the first argument. Passing a value of "1000" will likely cause abnormal behavior.

You should pass your DLLClass object a valid CWnd (or window handle) which can be passed to the SetTimer() call within Test().

/ravi

My new year's resolution: 2048 x 1536
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Control focus question

Deian25-Dec-04 5:09

Deian

25-Dec-04 5:09

Hello,

Does anyone know how to check if the current focus is over certain control, i.e. IDC_EDIT1 or IDC_EDIT2? Confused | :confused:

Thanks in Advance!

Re: Control focus question

Michael Dunn25-Dec-04 5:36

Michael Dunn

25-Dec-04 5:36

Call GetFocus() to get the HWND of the window with the focus, then GetDlgCtrlID() to get its ID.

--Mike--
LINKS~! Ericahist | 1ClickPicGrabber | CP SearchBar v2.0.2 | C++ Forum FAQ | You Are Dumb

Re: Control focus question

Deian25-Dec-04 5:53

Deian

25-Dec-04 5:53

Thank you

Converting char to int and int to char

sacoskun25-Dec-04 5:01

sacoskun

25-Dec-04 5:01

Hi,

I would like to convert a char into an int and vice versa.

For instance;

char a = '3';<br />
int a = 3;

Thanks in advance,

Re: Converting char to int and int to char

Michael Dunn25-Dec-04 5:40

Michael Dunn

25-Dec-04 5:40

See the FAQ
6.3 How can I change a number into its string representation, or vice versa?[^]

--Mike--
LINKS~! Ericahist | 1ClickPicGrabber | CP SearchBar v2.0.2 | C++ Forum FAQ | You Are Dumb

Re: Converting char to int and int to char

Mircea Puiu25-Dec-04 5:53

Mircea Puiu

25-Dec-04 5:53

One way would be:

<br />
============================<br />
char chA = '3';<br />
int nA;<br />
char chValue[32]; // actually 2 it's enough here :-))<br />
chValue[0] = chA;<br />
chValue[1] = 0; // null terminated string<br />
nA = atoi(chValue);<br />
============================<br />
char chA;<br />
int nA = 3;<br />
char chValue[32];<br />
itoa(nA, chValue, 10);<br />
chA = chValue[0];<br />
============================<br />

SkyWalker

Re: Converting char to int and int to char

sacoskun25-Dec-04 6:40

sacoskun

25-Dec-04 6:40

Hi Mircea, I used both the array and * implementations and it worked, thank you very much...

Thanks to Dunn also.

Re: Converting char to int and int to char

sacoskun25-Dec-04 7:09

sacoskun

25-Dec-04 7:09

I also would like to ask that is it possible to store for example number 14 in one character array element?

I mean;

if( myCharArray[2] == 14 )<br />
cout << "I want this" << endl;

Thanks,

Re: Converting char to int and int to char

mirex25-Dec-04 7:28

mirex

25-Dec-04 7:28

if number is only one digit then its simple.

char c = '3';

// char => int
int i = c - '0';

// int => char
c = '0' + i;

how to converte a sequence of jpeg to a movie?

max_xiayi25-Dec-04 2:20

max_xiayi

25-Dec-04 2:20

Any source code?

please contact:
max_xiayi@hotmail.com

Importing Dialog

Sheh Shehpori24-Dec-04 23:09

Sheh Shehpori

24-Dec-04 23:09

Friends,
I've created an application in VC++ 6.0. There is a dialog in it on which i dropped various controls and associate class with that dialog.

Now, i am creating another project in VC++ 6.0. I want to use the same dialog template and its class in this project.

Please tell me how can i "import" dialog from one project to another. Obviously i can reuse class header and cpp, but how can i import dialog template ??

Re: Importing Dialog

Dennis Gourjii24-Dec-04 23:41

Dennis Gourjii

24-Dec-04 23:41

If you mean the dialog resource, do it this way. Open the old project and simply copy the dialog resource to clipboard. Then, open the new project and paste it into its resource script in the resource view window. Should work.

Re: Importing Dialog

Shah Shehpori25-Dec-04 0:06

Shah Shehpori

25-Dec-04 0:06

unfortunately this is not working in case of different projects. If we have two dialogs in same project then we can copy-paste resources.

Re: Importing Dialog

Michael Dunn25-Dec-04 5:43

Michael Dunn

25-Dec-04 5:43

Open the new project normally and go to the resource view tab. Then click File|Open and open the .rc file in the old project. Then you can drag and drop resources from the old .rc file to the new project's resource view.

--Mike--
LINKS~! Ericahist | 1ClickPicGrabber | CP SearchBar v2.0.2 | C++ Forum FAQ | You Are Dumb

CListCtrl related

Aamir Butt24-Dec-04 21:39

Aamir Butt

24-Dec-04 21:39

Hi All, my CListCtrl's DeleteAllItems() is not working. Although it is returning me non-zero and according to MSDN it returns non-zero when it succeeds but it is not erasing the contents of List control. Any help/advice?

Regards,

Still Alone in this beautiful world Frown | :(

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