Re: for each - C / C++ / MFC Discussion Boards

Re: for each

David Crow22-Sep-06 8:46

David Crow

22-Sep-06 8:46

It's not a valid keyword.

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

"Judge not by the eye but by the heart." - Native American Proverb

Re: for each

Waldermort22-Sep-06 8:52

Waldermort

22-Sep-06 8:52

According to MSDN it is, they even give a C++ example showing it's usage.

Re: for each

David Crow22-Sep-06 8:58

David Crow

22-Sep-06 8:58

Not if it's the example I'm thinking of (the new C++/CLI extensions). Please provide a reference that indicates "for each" is valid in VC++ v6.

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

"Judge not by the eye but by the heart." - Native American Proverb

Re: for each

Waldermort22-Sep-06 9:01

Waldermort

22-Sep-06 9:01

http://msdn2.microsoft.com/en-us/library/ms177202.aspx[^]

It also says to compile with /clr which VC6 also doesn't recognise

Re: for each

David Crow22-Sep-06 9:05

David Crow

22-Sep-06 9:05

waldermort wrote:
http://msdn2.microsoft.com/en-us/library/ms177202.aspx[^]

You must've conveniently missed the part about it being for VC++ 2005.

waldermort wrote:

It also says to compile with /clr which VC6 also doesn't recognise

Of course it doesn't (support something newer than itself). Why would you think it would? Roll eyes | :rolleyes:

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

"Judge not by the eye but by the heart." - Native American Proverb

Re: for each

Waldermort22-Sep-06 9:12

Waldermort

22-Sep-06 9:12

Well, obviously it must be for a newer version of VS, but that page doesn't mention VC2005, or any other version of VC. It simple says "New Language Features in Visual C++". I did however notice the v80 within the link on my local copy. Poke tongue | ;-P

Re: for each

David Crow22-Sep-06 9:44

David Crow

22-Sep-06 9:44

waldermort wrote:
It simple says "New Language Features in Visual C++".

That very New Language Features in Visual C++ page states, "Visual C++ 2005 includes new syntax..."

VC++ v6 stopped being supported September of last year, and even then, new features would not be added to a language on its way out.

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

"Judge not by the eye but by the heart." - Native American Proverb

Re: for each

Zac Howland22-Sep-06 9:55

Zac Howland

22-Sep-06 9:55

waldermort wrote:
but that page doesn't mention VC2005, or any other version of VC. It simple says "New Language Features in Visual C++".

If you click on that "New Language Features in Visual C++" link, the first line on that page is:

New Language Features in Visual C++

Visual C++ 2005 includes new syntax for writing applications to target the common language runtime. This topic presents an overview of the new syntax.

While you can't use the for each-in syntax, you can use the STL for_each algorithm.

If you decide to become a software engineer, you are signing up to have a 1/2" piece of silicon tell you exactly how stupid you really are for 8 hours a day, 5 days a week

Zac

Can Dynamic 2D arrays solve stack overflow problem?

KaKa'22-Sep-06 7:55

KaKa'

22-Sep-06 7:55

Hi,

I wrote a piece of code which initially uses a 128 by 47 2D array. It works fine. But when I changed it to 1600 rows by 47 columns, the program starts to crash. The error message said that a stack overflow has occured.

I would like to know if dynamic 2D arrays solve this problem?
There are also some 1D arrays with the size of 1600. Do they have to be converted to dynamic arrays too?

Re: Can Dynamic 2D arrays solve stack overflow problem?

Waldermort22-Sep-06 9:17

Waldermort

22-Sep-06 9:17

Wouldn't it be easier to use a vector?

Re: Can Dynamic 2D arrays solve stack overflow problem?

Maximilien22-Sep-06 9:39

Maximilien

22-Sep-06 9:39

What is the size of the data? an array of what ?

dynamic arrays might or might not fix your problem if it's a size issue.

Maximilien Lincourt
Your Head A Splode - Strong Bad

Re: Can Dynamic 2D arrays solve stack overflow problem?

David Crow22-Sep-06 9:51

David Crow

22-Sep-06 9:51

75,200 ints would require 300,800 bytes of stack. If that were a double, it would require 601,600 bytes of stack, over half of the default value. Pass that around to only a few functions and the stack could be exhausted very easily.

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

"Judge not by the eye but by the heart." - Native American Proverb

Database connectivity

amaneet22-Sep-06 6:57

amaneet

22-Sep-06 6:57

Sir,
I want to connect the database(Sql Server) to vc++.net 1.1 programically.I also want to use insert delete update queries in the form .Please help me or please send any link for the problem.
Thanks.

Re: Database connectivity

led mike22-Sep-06 7:10

led mike

22-Sep-06 7:10

See all the Code Project articles here[^]

led mike

Static class

Waldermort22-Sep-06 6:32

Waldermort

22-Sep-06 6:32

I am creating a class which is more of a wrapper for functions than a class. There are no member variables to worry about. All the functions are static and can be accessed using a namespace or creating an instance. Is there a method of creating the whole class as static rather than prefixing each function definition with the keyword static?

Re: Static class

Zac Howland22-Sep-06 6:50

Zac Howland

22-Sep-06 6:50

If there are no member variables, why even make it a class? Why not just put each of those functions into a namespace?

If you decide to become a software engineer, you are signing up to have a 1/2" piece of silicon tell you exactly how stupid you really are for 8 hours a day, 5 days a week

Zac

Re: Static class

Waldermort22-Sep-06 6:53

Waldermort

22-Sep-06 6:53

I have never seen this before. How would you do that?

Re: Static class

Maximilien22-Sep-06 7:05

Maximilien

22-Sep-06 7:05

something like :

namespace Potato
{
 void Fry();
 void Boil();
 void Bake();
};

///...
Patato::Fry();

/// or but beware of namespace clash.
using Potato;
Fry();

Maximilien Lincourt
Your Head A Splode - Strong Bad

Re: Static class

Waldermort22-Sep-06 7:10

Waldermort

22-Sep-06 7:10

Perfect. Now, I wonder in the back of which book that was hiding?

Worker Thread question

Raul_Figous22-Sep-06 6:26

Raul_Figous

22-Sep-06 6:26

Hi
I am using AfxBeginThread function for creating a Thread. I need to create multiple threads inside a loop. In this case, i will be passing the same control function address to different Afxbeginthread (). Will it be a problem to pass the same function address to different Afxbeginthread ()?

Note: I won't be waiting inside the Loop to start the next Thread.

Please let me know your comments on this

Thanx in Advance.

"You must do things that you think you cannot do"
- Eleanor Roosevelt

Re: Worker Thread question

Zac Howland22-Sep-06 6:52

Zac Howland

22-Sep-06 6:52

Raul_Figous wrote:
I am using AfxBeginThread function for creating a Thread. I need to create multiple threads inside a loop. In this case, i will be passing the same control function address to different Afxbeginthread (). Will it be a problem to pass the same function address to different Afxbeginthread ()?

You won't have a problem here. However, as a performance thing, you might want to create each one suspended and then resume them after each is created.

If you decide to become a software engineer, you are signing up to have a 1/2" piece of silicon tell you exactly how stupid you really are for 8 hours a day, 5 days a week

Zac

Re: Worker Thread question

led mike22-Sep-06 7:08

led mike

22-Sep-06 7:08

Raul_Figous wrote:
I need to create multiple threads inside a loop.

How many? Any more than 5 or 10 and you should consider using a pool.

What are you doing in them? If you can use overlapped IO that would be better than threads.

led mike

Am i a file ? or am i a folder

Vikrant for VC++22-Sep-06 6:20

Vikrant for VC++

22-Sep-06 6:20

Hi Friends
I have a path as given below , now i wish to know whether the path given below is a file or folder.

I tried using OpenFile Function but it does not work for long names.

"C:\New Folder (4)\New Folder\New Folder\New Folder\New Folder\New Folder\New Folder\New Folder\New Folder\New Folder\New Folder\New Folder\New Folder\New Folder\New Folder\New Folder\New Folder\New Folder\New Folder\New Folder\New Text Document.txt"

Thanks in advance.

Re: Am i a file ? or am i a folder

David Crow22-Sep-06 6:53

David Crow

22-Sep-06 6:53

How about PathIsDirectory()?

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

"Judge not by the eye but by the heart." - Native American Proverb

Re: Am i a file ? or am i a folder

Vikrant for VC++22-Sep-06 7:06

Vikrant for VC++

22-Sep-06 7:06

Hi Buddy

Thanks a lot.
It works Smile | :)

.

Regards

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