C / C++ / MFC

_AnsHUMAN_ 14-Mar-07 23:11

_AnsHUMAN_

14-Mar-07 23:11

IMHO you should start with VC++6.0. While MS provides compatibility with the earlier API's many of the API's are deprecated, and are replaced with the new ones. But in your case it won't make a lot of difference and you should be able to run the applications in Charles Petzold on the OS's like XP. On Vista however there could be some administrative privileges etc that would need some tweaking.

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

toxcct14-Mar-07 23:25

14-Mar-07 23:25

_AnShUmAn_ wrote:
you should start with VC++6.0

AnShUmAn, VC6 compiler is far from being compliant to the Standard C++.

i really don't get the point in advising a beginner into this direction rather that VS2003 or even better VS2005 !

[VisualCalc][Binary Guide][CommDialogs] | [Forums Guidelines]

Eytukan14-Mar-07 23:39

Eytukan

14-Mar-07 23:39

Are you aware this was your 7000th Message??

Press: 1500 to 2,200 messages in just 6 days? How's that possible sir?
Dr.Brad :Well,I just replied to everything Graus did and then argued with Negus for a bit.

toxcct14-Mar-07 23:46

14-Mar-07 23:46

Yes[^] :->

[VisualCalc][Binary Guide][CommDialogs] | [Forums Guidelines]

Eytukan14-Mar-07 23:48

Eytukan

14-Mar-07 23:48

Even I knew it from his link[^]

Press: 1500 to 2,200 messages in just 6 days? How's that possible sir?
Dr.Brad :Well,I just replied to everything Graus did and then argued with Negus for a bit.

Rajesh R Subramanian15-Mar-07 0:55

Rajesh R Subramanian

15-Mar-07 0:55

toxcct wrote:
Yes[^] :->

:->

[Frozen Thoughts] | [My Life - My Prayer]
Nobody can give you wiser advice than yourself. - Cicero
ப்ரம்மா

Mark Salsbery15-Mar-07 5:36

Mark Salsbery

15-Mar-07 5:36

YES! Read the book a few times and LEARN IT. There's alot of new stuff in Windows but the
basics still very much apply. The number of things that have changed or been deprecated is so
small compared to the pain of writing Windows software without understanding the basics.

IMO there's no reason not to use the latest VS/compiler for new application development.

Mark

"Great job, team. Head back to base for debriefing and cocktails."
(Spottswoode "Team America")

Hamid_RT15-Mar-07 19:21

Hamid_RT

15-Mar-07 19:21

And I suggest see www.cplusplus.com it has good tutorials of course also www.codeproject.com is good place Wink | ;)

WhiteSky

Allocate memory inside function ??

ThatsAlok15-Mar-07 20:36

ThatsAlok

15-Mar-07 20:36

Cmania wrote:
Although the answer would be VS2005 but wont i be illiterate about VC6 or will it cover that too.

tryhttp://codeproject.com/cpp[^]

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
Global Interface Table: An Easy Way to Marshal an Interface Pointer[new]
VC Forum Q&A :- I/ IV
Support CRY- Child Relief and You

fx920014-Mar-07 21:45

14-Mar-07 21:45

Hello
I want to allocate memory for a void* pointer inside a function;
i tried to do that by using malloc to the pointer passed as an argument ;

the memory space was not kept after function return;

how kan i do that
thanks

toxcct14-Mar-07 22:10

14-Mar-07 22:10

please show a brief piece of the code you wrote for that...

[VisualCalc][Binary Guide][CommDialogs] | [Forums Guidelines]

fx920014-Mar-07 22:17

14-Mar-07 22:17

the code is too long but :

#define STRUCT struct mystruct

void function (void *input){
....
pointer = (STRUCT*) malloc (sizeof(STRUCT));

//filling in input attributes...

input = pointer;
}

main(){
void *ptr;
function (ptr);
printf("%...", ptr->..........);
}

this work only if i allocate the memory for ptr in the main program

toxcct14-Mar-07 22:21

14-Mar-07 22:21

fx9200 wrote:
pointer = (STRUCT*) malloc (sizeof(STRUCT));

why don't you directly write into input ?

input = (STRUCT*) malloc (sizeof(STRUCT));

[VisualCalc][Binary Guide][CommDialogs] | [Forums Guidelines]

fx920014-Mar-07 22:25

14-Mar-07 22:25

i tried it

i had the same result in all cases

prasad_som14-Mar-07 22:33

prasad_som

14-Mar-07 22:33

Change this to,

void function (void **input){
....
*pointer = (STRUCT*) malloc (sizeof(STRUCT));

//filling in input attributes...

input = pointer;
}

main(){
void *ptr;
function (&ptr);
printf("%...", ptr->..........);
}

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

Cedric Moonen14-Mar-07 22:15

Cedric Moonen

14-Mar-07 22:15

fx9200 wrote:
the memory space was not kept after function return;

You need to pass your pointer by reference. Otherwise it will still point at the previous memory location.

Cédric Moonen
Software developer

Charting control [v1.1]

fx920014-Mar-07 22:34

14-Mar-07 22:34

how to pass reference(pointer) by reference ?

please give example

David Crow15-Mar-07 2:56

David Crow

15-Mar-07 2:56

fx9200 wrote:
how to pass reference(pointer) by reference ?

please give example

See here.

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

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

toxcct14-Mar-07 22:41

14-Mar-07 22:41

he seems to doing C, not C++... so no reference available (in the sense of C++ understands it). but pointers remain good

[VisualCalc][Binary Guide][CommDialogs] | [Forums Guidelines]

fx920014-Mar-07 22:46

14-Mar-07 22:46

yes

so ?

toxcct14-Mar-07 22:55

14-Mar-07 22:55

fx9200 wrote:
yes

so ?

so, prasad_som[^] gave you an answer... hve you read it ?

[VisualCalc][Binary Guide][CommDialogs] | [Forums Guidelines]

fx920014-Mar-07 22:57

14-Mar-07 22:57

i'm trying thanks

prasad_som14-Mar-07 22:56

prasad_som

14-Mar-07 22:56

Though, its not applicable in C context. You need to understand theory behind Cedric's suggesstion.
In you original code, you was passing pointer argument. Though its a pointer, it will be passed by value, and inside that function, memory allocated will be not at address you expected.

In that case you need to pass pointer to pointer, as shown in my previous reply.

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

fx920014-Mar-07 23:07