C / C++ / MFC

Re: Retriving Data from Map

11-Mar-09 3:24

brucewayn wrote:
so please suggest how can we get the data from the end in a map???

What about something like:

itera = m_mapFinalSortVirusData.end();
itera--;
int nCount= itera->first;
CString strvirname = itera->second;

"Old age is like a bank account. You withdraw later in life what you have deposited along the way." - Unknown

"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

ahmad_ali11-Mar-09 3:25

ahmad_ali

11-Mar-09 3:25

According to this page
http://www.cplusplus.com/reference/stl/map/[^]
map supports bidirectional iterator.

This means you could start from map.end() and then use the operator-- to obtain the last element.

Re: Retriving Data from Map

Jijo.Raj11-Mar-09 3:35

Jijo.Raj

11-Mar-09 3:35

Hello brucewayn,

Is your logic dependent on the order of inserted items in map? I just want to tell you that, unlink other containers such as vector, list etc, there is no order for the inserted item in map. So be careful.

Regards,
Jijo.

_____________________________________________________

http://weseetips.com[^] Visual C++ tips and tricks. Updated daily.

How to calculate total line number of a text file

akira3211-Mar-09 3:01

akira32

11-Mar-09 3:01

How to calculate total line number of a text file?
I have a text file. I want to get the total line number of it. Could somebody know which function should I use? Or I should write the counting code for each line?

Re: How to calculate total line number of a text file

CPallini11-Mar-09 3:04

CPallini

11-Mar-09 3:04

akira32 wrote:
Or I should write the counting code for each line?

Yes.

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Re: How to calculate total line number of a text file

Hamid_RT11-Mar-09 3:20

Re: How to calculate total line number of a text file

11-Mar-09 3:20

Oh Pallini your answer is very mp3. Big Grin | :-D

Of one Essence is the human race
thus has Creation put the base
One Limb impacted is sufficient
For all Others to feel the Mace
(Saadi )

CPallini11-Mar-09 3:40

CPallini

11-Mar-09 3:40

Hamid. wrote:
mp3.

Do you mean concise, if I guess well.
Smile | :)

Re: How to calculate total line number of a text file

Michael Schubert11-Mar-09 4:23

Michael Schubert

11-Mar-09 4:23

Or as in "compressed"?

Re: How to calculate total line number of a text file

Hamid_RT11-Mar-09 7:48

Re: How to calculate total line number of a text file

11-Mar-09 7:48

That's right but we tell mp3 or (new version mp4 Big Grin | :-D

)(I thought you know it,why you dont know you need a travel to my country Smile | :)

Of one Essence is the human race
thus has Creation put the base
One Limb impacted is sufficient
For all Others to feel the Mace
(Saadi )

CPallini11-Mar-09 8:16

CPallini

11-Mar-09 8:16

Hamid. wrote:
why you dont know you need a travel to my country

Yours is a wonderful Country, I would like very much to travel to. Smile | :)

Re: How to calculate total line number of a text file

Hamid_RT12-Mar-09 20:00

Re: How to calculate total line number of a text file

12-Mar-09 20:00

Best time is spring you can see four seasons at this time the south is warm the north west is cold the center is moderate(almost) and the north is sultry.

Of one Essence is the human race
thus has Creation put the base
One Limb impacted is sufficient
For all Others to feel the Mace
(Saadi )

David Crow11-Mar-09 3:17

Re: How to calculate total line number of a text file

11-Mar-09 3:17

You could open the file and read each character to see if it is a newline. This is not very efficient because of disk I/O but it will handle very large files. You could also read the entire file into a buffer and then read through the buffer counting newline characters. This is more efficient because disk I/O is done once, but it will not handle very large files. There are also functions that will read lines from files (they know internally to read to the next newline) so you could just count how many times a line is read.

Code-o-mat11-Mar-09 7:08

Code-o-mat

11-Mar-09 7:08

Or he could do the "inbetween" solution, create a buffer of some size and read as much of the file into it as he can, start counting and when he runs out of the buffer he can read more of the file in and continue with the same buffer starting from its beginning. This is much much much faster than reading char by char or line by line even, it will handle large files, but it won't eat up every bit of memory it finds hanging around the data bus "just chillin', wathching the game, having a beer". Smile | :)

> The problem with computers is that they do what you tell them to do and not what you want them to do. <
> Life: great graphics, but the gameplay sux. <

Re: How to calculate total line number of a text file

Hamid_RT11-Mar-09 3:19

Re: How to calculate total line number of a text file

11-Mar-09 3:19

You need to read line by line on the text files.

Of one Essence is the human race
thus has Creation put the base
One Limb impacted is sufficient
For all Others to feel the Mace
(Saadi )

Stuart Dootson11-Mar-09 4:12

Stuart Dootson

11-Mar-09 4:12

You could try this:

std::ifstream myFile("a.cpp");
int count = 0;
std::string s;
while (std::getline(myFile, s))
   ++count;

although I suspect this (counting the line-feed characters in the file) is slightly better:

std::ifstream myFile("a.cpp", std::ios::binary);
myFile >> std::noskipws;
std::cout << 1+std::count(std::istream_iterator<char>(myFile), std::istream_iterator<char>(), (char)10) << std::endl;

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

SDI-appliction

susanne111-Mar-09 2:52

susanne1

11-Mar-09 2:52

hallo to all,

i have an SDI-MFC application which is divided by a CSplitterWnd object to 2 parts, the upper part for input text and the lower part for the output text, i need to be able to print out the content of both parts individually. I treid to use the OnPrint() and OnPrintFile(), but both are protected members. Any help to solve this problem will be appriciated. Please explain or give a link to a site that explain in details. Thanks.

David Crow11-Mar-09 2:58

11-Mar-09 2:58

Since you have two CView-derived classes, and OnPrint() is a virtual function, you should be able to override it in each view.

susanne111-Mar-09 3:09

susanne1

11-Mar-09 3:09

I have CEditView and OnPrint() is a protected member, i did not understand what dii you mean?

David Crow11-Mar-09 3:12

11-Mar-09 3:12

susanne1 wrote:
I have CEditView...

Derive a class from it rather than use it directly.

susanne111-Mar-09 3:30

susanne1

11-Mar-09 3:30

after driving a class from CEditView , i will define the protected OnPrint(CDC* pDc, CPrintInfo* pInfo)
as void OnMyPrint(CDC* pDc, CPrintInfo* pInfo)
{
which code comes hier?
}

David Crow11-Mar-09 3:41

11-Mar-09 3:41

susanne1 wrote:
which code comes hier?

What ever you need to print the contents of that view. There's no one-answer solution.

As a test to make sure you're on the right track, you could do something like:

void CEditView1::OnPrint(CDC* pDc, CPrintInfo* pInfo)
{
    pDC->TextOut(5, 5, "This text is from CEditView1", 28);
}
 
void CEditView2::OnPrint(CDC* pDc, CPrintInfo* pInfo)
{
    pDC->TextOut(5, 5, "This text is from CEditView2", 28);
}

My second time to design a website...

SandipG 11-Mar-09 4:12

SandipG

11-Mar-09 4:12

Check Print Tutorial[^]..

I hope it helps..

Regards,
Sandip.

JackPuppy11-Mar-09 2:15

JackPuppy

11-Mar-09 2:15

It will be my second time to design a website. Last time I use C# and ASP.net all I do in my teem is writing event manipulation C# code begind every important component(such as buttons, textbox, etc..). I know little a bout what happens after a user send a get message( which looks like: GET www.dodd.com/dkdlf.html HTTP 1.1/r/n.....) and how this data is transfered and maninulated by what? What's the relationship between Server II and C#code and ASP.net code. I really don't know nothing about this and I need a book that can at least demonstrate these things in a clear way.

Can someone provide a book fulled my demands?
It will be greatly appreciated because I really want to make myself clear at what i'm doing.

Thanks!

Jack

Re: My second time to design a website...

Hamid_RT11-Mar-09 3:23