C / C++ / MFC

23-Jun-05 21:14

a_du wrote:
want to read and write a .csv file using CFile.

Instead of CFile use it's derived Class CStdioFile,as it's Member Function CStdioFile::ReadString read file LINE by LINE

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

cheers,
Alok Gupta

Re: CFile---reda write

Priyank Bolia23-Jun-05 21:29

Priyank Bolia

23-Jun-05 21:29

I guess you should use CStdioFile instead of CFile and use function like ReadString and WriteString. Then use Tokenize function of CString to parse the data.
a_du wrote:
if i define a buffer[length] to load the data, i found that the last few chars of the array are mass things.How does this come

<br />
byte buffer[length + 1];<br />
buffer[length] = '\0';

http://www.priyank.in/

COMPARE 2 Strings

ana_bahy23-Jun-05 20:02

23-Jun-05 20:02

Hey , i got a small tiny littile Question...
which is:

string string1;
string string2;

i wana check if da first 10 char in string1 == da first 10 char in string 2
how can i write that in c++??

Sorry for bothering ,
My regards,
Bahy

Maxwell Chen23-Jun-05 20:32

Maxwell Chen

23-Jun-05 20:32

using std::string;<br />
<br />
int main()<br />
{<br />
	string a("1234567890INTEL");<br />
	string b("1234567890AMD");<br />
<br />
	if(10 > a.length() || 10 > b.length()) {<br />
		std::cout << "Length.\n";<br />
		return 0;<br />
	}<br />
<br />
	std::cout << a.c_str() << "\n";<br />
	std::cout << b.c_str() << "\n";<br />
<br />
	int res = a.compare(0, 10, b, 0, 10);<br />
	std::cout << "res = " << res << ".\n";<br />
<br />
	return 0;<br />
}<br />

Maxwell Chen

Weiye Chen23-Jun-05 20:36

Weiye Chen

23-Jun-05 20:36

One way would be to copy out the 10 characters in each string before comparing

char szStr1[11], szStr2[11];
 
// Copy first 10 characters
strncpy(szStr1, string1, 10);
strncpy(szStr2, string2, 10);
 
// Append null terminating character
szStr1[10] = '\0';
szStr2[10] = '\0';
 
// Start comparing
if(strcmp(szStr1, szStr2) == 0)
{
   // They are equal
}

<font=arial>Weiye Chen
Life is hard, yet we are made of flesh...

ana_bahy23-Jun-05 20:42

23-Jun-05 20:42

thanks u soo much ..bt it gave me an error at those lines
strncpy(szStr1, string1, 10);
strncpy(szStr2, string2, 10);
and the error is
cannot convert parameter 2 from 'class std::basic_string<char,struct std::char_traits<char="">,class std::allocator<char> >' to 'const char *'
No user-defined-conversion operator available that can perform this conversion, or the operator cannot be called

SO what can i do??
My regards..
bahy

toxcct23-Jun-05 20:49

toxcct

23-Jun-05 20:49

replace string1 with string1.c_str()

cheers,

TOXCCT >>> GEII power
[toxcct][VisualCalc]

ana_bahy23-Jun-05 20:58

23-Jun-05 20:58

Thank You soooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo Much...

toxcct23-Jun-05 21:00

toxcct

23-Jun-05 21:00

wow, no problem Smile | :)

it was a pleasure !

Cool | :cool:

TOXCCT >>> GEII power
[toxcct][VisualCalc]

ana_bahy23-Jun-05 21:14

23-Jun-05 21:14

Hello My Teacher ,
Can i ask you 1 more question , (if u dont mind)
How can i ask the user to insert a string , and to be saved in Title
i believe if it was a char[30] i can use

char Title[30];
cin.getline(Title,30);

But what is the case if it String??

My regards,
Bahy

Maxwell Chen23-Jun-05 21:14

Maxwell Chen

23-Jun-05 21:14

I thought ana was asking the C++ string type.... D'Oh! | :doh:

Maxwell Chen

GDavy23-Jun-05 21:15

GDavy

23-Jun-05 21:15

or in just 1 line:
strncmp( string1.c_str(), string2.c_str(), 10);

ana_bahy23-Jun-05 21:25

Entry and exit (When Exit its does entry)

23-Jun-05 21:25

Hey ,,thanks for da code , it really works fine...
but can u tell me what does it mean , cause i cant understand how it works..
My regards,
ana bahy

Cillieacc0rd5o423-Jun-05 19:46

Cillieacc0rd5o4

23-Jun-05 19:46

Hi i am using this code to Initialize a driver when the DLL is used.
I want it initialzse the driver when the DLL is used.
And when the DLL is exited or is not used no more the driver unloaded.
The problem i am having is, That whne it loads its fine, but when i unload the DLL. It loads the driver twice and then it displays unload. Can i somehow fix the double load and then load problem somehow?

void exitfkt(void)
{
MessageBox(NULL,"Unload Dll", "Test", MB_ICONINFORMATION | MB_OK);
}

BOOL APIENTRY DllMain( HANDLE hModule,
DWORD ul_reason_for_call,
LPVOID lpReserved
)
{
MessageBox(NULL,"Load Dll", "Test", MB_ICONINFORMATION | MB_OK);
atexit(exitfkt);

return TRUE;
}

Re: Entry and exit (When Exit its does entry)

ThatsAlok23-Jun-05 22:52

Re: is this a memory leak?

23-Jun-05 22:52

Cillieacc0rd5o4 wrote:
BOOL APIENTRY DllMain( HANDLE hModule,
DWORD ul_reason_for_call,
LPVOID lpReserved
)
{
MessageBox(NULL,"Load Dll", "Test", MB_ICONINFORMATION | MB_OK);
atexit(exitfkt);

return TRUE;
}

change it to..........

BOOL APIENTRY DllMain( HANDLE hModule, 
DWORD ul_reason_for_call, 
LPVOID lpReserved
)
{

switch(ul_reason_for_Call)
{
case <code>DLL_PROCESS_ATTACH</code>:
MessageBox(NULL,"Load Dll", "Test", MB_ICONINFORMATION | MB_OK);
break;
case <code>DLL_PROCESS_DETACH</code>:
atexit(exitfkt);
break;
}
return TRUE;
}

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

cheers,
Alok Gupta

is this a memory leak?

Hums23-Jun-05 19:02

Hums

23-Jun-05 19:02

say you have a base class

class base
{
public:
[vars]
[funcs]
virtual void func()=0;
};

and child class that inherits the base but adds some of its own variables and functions

class child: public base
{
public:
[more vars]
[more funcs]
void func() {[statements]};
};

if you then were to declare, use, and release as follows, is there a memory leak, or other problem? It seems wrong to me, but I want to do it this way.

base* apple;

apple = new child;

apple->func();

delete apple;

Thanks for any help.

Weiye Chen23-Jun-05 19:20

Weiye Chen

23-Jun-05 19:20

There's nothing wrong i believe. Just make sure your child class has a virtual destructor to clean up whatever memory allocations you made in it.

<font=arial>Weiye Chen
Life is hard, yet we are made of flesh...

How to find the missing samples in PCM or Sine Wave

jag_kgp23-Jun-05 19:01

jag_kgp

23-Jun-05 19:01

Hi,
I am jagadishg doing M.Tech in I.I.T Kharagpur.currently i am working on audio programming. I am in need of your help to "Finding the Missing PCM samples". so i need the source code either in c/c++.
I tried in MAT lab, using sine wave generation,there i experiment by missing some samples.
so kindly help me to find out this thread.
thanks in advance.

Jagadish

Image Transformation

ThatsAlok23-Jun-05 18:40

23-Jun-05 18:40

Hello All,
I am working on screen saver, which need to display an Image in different ways i.e. coming from bottom/top , fading in or fading out or more. I would love to make these by my own, But i have no time left to do so and deadline is approaching , So i am going after any ready made solution offcourse with Source Code!.

Please somebody point me in right direction to accomplish above task! thanks

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

cheers,
Alok Gupta

GetFont

Veera Raghavendra23-Jun-05 18:33

Veera Raghavendra

23-Jun-05 18:33

Hai..

I am hooking the wordpad application. I have typed some text in the wordpad. Now i want the fontname of the text.How to get that.Please let me know.

Thanking you, Rose | [Rose]

e.veera raghavendra

Re: GetFont

ThatsAlok23-Jun-05 18:45

23-Jun-05 18:45

Veera Raghavendra wrote:
wordpad application. I have typed some text in the wordpad. Now i want the fontname of the text.How to get that.Please let me know.

If you are hooking the wordpad application, you must have the handle of RichEditCtrl Window.now using that handle and EM_GETCHARFORMAT message you can retrieve current fontname of text at cursor position

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

cheers,
Alok Gupta

PLZ HELP

ana_bahy23-Jun-05 16:56