is there an Opera Control just like ie control for IE? - C / C++ / MFC Discussion Boards

Re: Release mode and Debug mode ?

Hamid_RT8-Dec-06 1:13

Hamid_RT

8-Dec-06 1:13

You can see an article about release & debug mode and different their on codeproject,search about it

WhiteSky

Right Click

Anilkumar K V8-Dec-06 0:22

Anilkumar K V

8-Dec-06 0:22

How to pass the filename to my program on
right click a file -> select my app

I have modified the registry to show my app on menu & invoke my app.
How i pass the filename as commandline or anyother way

Re: Right Click

Naveen8-Dec-06 0:53

Naveen

8-Dec-06 0:53

i think the file will be passed as the command line. Did u check the command line using GetCommandLine()?

nave

Re: Right Click

David Crow8-Dec-06 3:31

David Crow

8-Dec-06 3:31

anilFirst wrote:
How i pass the filename as commandline or anyother way

That's what the %1 was for that you added to the registry.

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

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

File Update

kamalesh828-Dec-06 0:08

kamalesh82

8-Dec-06 0:08

Am trying to oepn a text file( not empty file). Want to delete a specified portion of the file ( around 10 chars from the middle of the file). how can i do it? i've already calculated start position and end position. but don't know how to delete that part and again write that part.

Thanks in advance

kamalesh

Re: File Update

Sakthiu8-Dec-06 0:18

Sakthiu

8-Dec-06 0:18

Use feek and ftell functions.

Those two might help you.

bye.

Re: File Update

David Crow8-Dec-06 3:34

David Crow

8-Dec-06 3:34

One way is to read the entire file contents into a buffer, modify the buffer, and write the buffer back out to the file.

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

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

is there an Opera Control just like ie control for IE?

szcococut7-Dec-06 23:58

szcococut

7-Dec-06 23:58

thanks

recognition voice

andreas_6357-Dec-06 23:38

andreas_635

7-Dec-06 23:38

Hello,
i am developing an application which i have to compare two wav files!Do you have to suggest me something(e.x. link)?How can i do it because i am newbbie on the issue!
Thanks

Testing if a string is empty

Programm3r7-Dec-06 22:16

Programm3r

7-Dec-06 22:16

Hi all,

Simple question .... (funny that I can't remember how to do it)

I have variable:
char TestString[3];

How can one test if the TestString is Empty Confused | :confused:

I have tried the following, without success:

<br />
if (TestString == "")<br />
{ <br />
 ....<br />
}<br />

Thanx in advance

The only programmers that are better than C programmers are those who code in 1's and 0's..... Smile | :)

Programm3r

Re: Testing if a string is empty

prasad_som7-Dec-06 22:25

prasad_som

7-Dec-06 22:25

strlen.

Programm3r wrote:
char TestString[3];

In this case, it will not be an empty string.Contains some garbage.
try,

char TestString[3] = {0};
or 
char TestString[3] = "";
cout<<strlen(TestString)<<endl;

It will give you desired output. i.e. output will be 0, which indiacates empty string.

Prasad
Notifier using ATL | Operator new[],delete[][^]

Re: Testing if a string is empty

joelgarabedian7-Dec-06 22:26

joelgarabedian

7-Dec-06 22:26

You need to do

if(strlen(TestString) == 0)

or

if(strcmp(TestString, "") == 0)

Remember that your string will not be initialised when you declare it though, so neither test is valid until you've put something into the string (NULL for the first character at the very least). Or you can do the following...

memset(&TestString[0], 0, sizeof(TestString));

Hope this helps,

Joel.

Re: Testing if a string is empty

CPallini7-Dec-06 22:30

CPallini

7-Dec-06 22:30

Your string

Programm3r wrote:
char TestString[3];<code></blockquote><br />
<br />
is not empty, it's random (junk) initialised (end it is not <code>NULL
terminated!).

maybe the following code snipped will help you:
char TestString[3]="";



if (!strcmp(TestString,  ""))
{
    printf("empty\n");
}
else
{
    printf("not empty: %s\n", TestString);
}
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.

Re: Testing if a string is empty

Christian Graus7-Dec-06 22:41

Christian Graus

7-Dec-06 22:41

if (!TestString[0])
{
// The first character is null, therefore it's empty
}

That's assuming you have set it to be empty. This is one of many reasons to avoid char arrays and use std::string or CString. Unless you're trapped in C, which I seem to recall, you are.

In this case, make sure you use memset to clear the contents of a new char array, so the above test will work. All the other tests will do the same thing, they will look to see how many characters there are before a NULL.

Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog

Thank you all very much :)

Programm3r7-Dec-06 22:43

Programm3r

7-Dec-06 22:43

Regards

The only programmers that are better than C programmers are those who code in 1's and 0's..... Smile | :)

Programm3r

Re: Thank you all very much :)

kakan7-Dec-06 23:32

kakan

7-Dec-06 23:32

In addition to all the things said, it's always good programming practice to initialize the variables before testing on them.

IMO, one common reason for problem is that memory is allocated differently in debug and release mode.
In debug, the allocated buffer becomes filled with null-bytes.
In release-build, it isn't. It's filled with junk characters (whatever is on the stack).

So (without initializing) testing for '\0' at index 0 works in debug mode, but not in release mode.
That's something to watch out for..

Alcohol. The cause of, and the solution to, all of life's problems - Homer Simpson

I agree completely.

CPallini8-Dec-06 3:13

CPallini

8-Dec-06 3:13

kakan wrote:
n debug, the allocated buffer becomes filled with null-bytes.
In release-build, it isn't. It's filled with junk characters (whatever is on the stack).

and this is the source of very weird bugs.

Smile | :)

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.

including C++ header file in .C file

Shailesh Ha7-Dec-06 21:48

Shailesh Ha

7-Dec-06 21:48

Hello,
when i include a header file of a class in a ".c" file ...i get error ... "class name" is undefined identifier.

how do i solve this?
amy clues?

regards
Shailesh

Re: including C++ header file in .C file

prasad_som7-Dec-06 22:30

prasad_som

7-Dec-06 22:30

class is C++ keyword. Why you want to use it in C?

Prasad
Notifier using ATL | Operator new[],delete[][^]

Re: including C++ header file in .C file

Christian Graus7-Dec-06 22:44

Christian Graus

7-Dec-06 22:44

You're speaking Dutch to a Frenchman. In other words, no .c file can contain a class. There are no classes in C.

Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog

Re: including C++ header file in .C file

CPallini7-Dec-06 22:57

CPallini

7-Dec-06 22:57

Shailesh Halankar wrote:
how do i solve this?

You cannot.
Frown | :(

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.

Re: including C++ header file in .C file

vijay_aroli8-Dec-06 2:39

vijay_aroli

8-Dec-06 2:39

Shailesh Halankar wrote:
i include a header file of a class in a ".c" file

is that what u said, or are we getting u wrong?? Confused | :confused:

you are trying to use classes in C?? OMG | :OMG:

May be u are not explaining correctly i guess. Smile | :)

vijay.

Re: including C++ header file in .C file

Zac Howland8-Dec-06 5:01

Zac Howland

8-Dec-06 5:01

Shailesh Halankar wrote:
when i include a header file of a class in a ".c" file

You make your file a .cc, .cpp, or .cxx file Poke tongue | ;-P

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

Why is my C program crashing?

<color>Aljechin 7-Dec-06 21:26

<color>Aljechin

7-Dec-06 21:26

Where am I going wrong? I am trying to implement strcpy manually.

<code>
main()
{
     char *source = "Hi", *dest = "";
     while(*source++) *dest++ = *source;
}

Visual C++ 6.0 Compiler with service pack 6. WindowsXP 32 bit edition.

Re: Why is my C program crashing?

Naveen7-Dec-06 21:30

Naveen

7-Dec-06 21:30

Aljechin wrote:
*dest = "";

u havent allocated memory for the dest

nave

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.