C / C++ / MFC

11-Apr-02 3:56

Ok... don't comment on the logical side of this code, I just have a small question that needs to be answered...;P

This code will give me a "user breakpoint" before exiting if I keep "for(i=6;i<8; i++)". BUT, change that to "for(i=6;i<7; i++)", which will obviously go through the loop only once, will work and exit properly.

So I guess that I don't even know how to use chars anymore (thanks to MFC and CString!!!) And I need to know why it won't work and what is the proper way to achieve what I want to do. Here's the code:

int main(int argc, char* argv[])
{
int i = 6;

char *pBody = new char;
char sz[4] = "test";

strcpy( pBody, "\0" );
for(i=6;i<8; i++)
{

strcat( pBody, sz );

strcat( pBody, ": " );

strcat( pBody, sz );

strcat( pBody, "\n" );

}

strcat( pBody, "\0" );

return 0;

delete [] pBody;
pBody = NULL;
}

Also, I guess it would be a nice thing for me to re-learn C/C++... Wink | ;)

I feel like a hobbyist... Frown | :(

Thanks!

---------------
Ok, we suck at C/C++, but we're good at website design and MFC apps!!!
http://www.edovia.com

LukeV11-Apr-02 4:13

11-Apr-02 4:13

Ok, I guess I should use:

char *pBody = new char[somevalue];

instead of:

char *pBody = new char;

silly me... Blush | :O

But the thing is that I don't know how many loops I'll have. Can I resize the char on the fly? Or, I could use:

char *pBody = new char[nbOfFields-6];

Is that correct?

Another question I end up answering myself! Cool | :cool:

---------------
Nah, we're cool!
http://www.edovia.com

Bernhard11-Apr-02 4:23

11-Apr-02 4:23

if you want to make memory leaks the second thing works perfectly.. but you can't resize arrays on the heap..
so if oyu wanna resize it.. use sthing like:

char *pBody = 0;

pBody = new char [14];
delete pBody;
pBody = new char [16];

//now you have resized pBody from 14 to 16 all the data will be lost..

hope this helps..
(i just can recommend that you try to give std::string a try.. cause i think c-arrays suck royal.. i shot myself in the foot with this too often )

Sometimes I think the surest sign for intelligent life elsewhere in
the universe is that none of them ever tried to contact us.

LukeV11-Apr-02 4:27

11-Apr-02 4:27

I wanted to use std::string but a function I use requires a const char[] as a parameter and string.c_str is no good. Unless there's a way to convert the string to a char when I'm done...

any ideas?

[edit] I guess string.c_str didn't work because I thought it was a variable, not a function. string.c_str() should work. Speaking of work, I think I work too much Laugh | :laugh:

---------------
http://www.edovia.com

Bernhard11-Apr-02 4:31

11-Apr-02 4:31

hemm?

std::string s;
char an_old_array [16] = "";

s = "hy luke";
a_old_function (s.c_str());
strcpy (an_old_array, s.c_str());

do you have got any other questions ?
or what do you need exactly ?

Sometimes I think the surest sign for intelligent life elsewhere in
the universe is that none of them ever tried to contact us.

LukeV11-Apr-02 4:34

11-Apr-02 4:34

No, you answered it perfectly! It's me that was confused... I should take a nap Wink | ;)

Thanks Bernard!

---------------
http://www.edovia.com

Bernhard11-Apr-02 4:37

11-Apr-02 4:37

no problem...

bernhard

Sometimes I think the surest sign for intelligent life elsewhere in
the universe is that none of them ever tried to contact us.

luckylours11-Apr-02 4:36

luckylours

11-Apr-02 4:36

perhaps you can use

YourConstChar=YourCstring.GetBuffer(0);

Oz Ben Eliezer11-Apr-02 13:45

Oz Ben Eliezer

11-Apr-02 13:45

Shouldn't it be

<br />
delete [] pBody;<br />

instead of

<br />
delete pBody;<br />

Bernhard11-Apr-02 20:02

11-Apr-02 20:02

of course..
sorry.. but i have to say that i hardly (say never) use c-arrays.. so.. that may be the reason why i didn't notice that..
yeah..

have a nice time..
bernhard

Sometimes I think the surest sign for intelligent life elsewhere in
the universe is that none of them ever tried to contact us.

A nice CGI class for... GCI apps???

Tim Smith11-Apr-02 10:16

Tim Smith

11-Apr-02 10:16

WHEWWWWWWW!!!!!!

When I read this subject, I thought my secret had been exposed. Smile | :)

Tim Smith

I know what you're thinking punk, you're thinking did he spell check this document? Well, to tell you the truth I kinda forgot myself in all this excitement. But being this here's CodeProject, the most powerful forums in the world and would blow your head clean off, you've got to ask yourself one question, Do I feel lucky? Well do ya punk?

STL and VC++

xicoloko11-Apr-02 3:39

xicoloko

11-Apr-02 3:39

Since I started to use STL in my application it depends on the MSVCP60 library. I thought that since STL is a set of template classes it would be static linked, but unfortunately it isn't.

Is there some way to avoid this dependency?

Cheers,
- xico -

Re: STL and VC++

Nish Nishant11-Apr-02 7:23

Nish Nishant

11-Apr-02 7:23

STL need not be linked in. Its a source code thing totally or that's what CG has got me to believe

Nish

One little CD gone,
Then two CDs gone,
Then 5 more gone,
For a total 7 gones,
If I was a CD R,
I'd wanna cry,
Cause I'd be just a goner,
For a nasty CD burner.
[funny how frustration wakes up the poet in me]

Re: STL and VC++

Tim Smith11-Apr-02 10:16

Tim Smith

11-Apr-02 10:16

Nope, STL just like anything else can be compiled into a DLL with the methods exported. You will find that the string class does this a lot.

Tim Smith

I know what you're thinking punk, you're thinking did he spell check this document? Well, to tell you the truth I kinda forgot myself in all this excitement. But being this here's CodeProject, the most powerful forums in the world and would blow your head clean off, you've got to ask yourself one question, Do I feel lucky? Well do ya punk?

Re: STL and VC++

Mike Nordell11-Apr-02 9:00

Mike Nordell

11-Apr-02 9:00

Link with it statically (i.e. libc instead of msvcrt).

Project/Settings: Tab "C/C++". Select "Code Generation" from the drop-list. Select anything suitable that does not contain "DLL" in the drop-list for "Use run-time library:".

/Mike

WINDOWPLACEMENT

NC11-Apr-02 3:37

11-Apr-02 3:37

Hi!
I am using WINDOWPLACEMENT structure to get and set the size of window. Although the size of the window is correct, the left and top positions remain the same. So, the positon of my window never gets recorded. Does anybody know why?

Thanks,

NC

Re: WINDOWPLACEMENT

Jeremy Falcon11-Apr-02 10:11

Jeremy Falcon

11-Apr-02 10:11

WINDOWPLACEMENT holds/sets information about the position info in certain states. It doesn't get/set the current positon of the Window.

Look at...

GetWindowRect()
SetWindowPos() or MoveWindow()

Jeremy L. Falcon
"The One Who Said, 'The One Who Said...'"
<nobr>
Homepage : Feature Article : Sonork = 100.16311

LukeV11-Apr-02 3:29