C / C++ / MFC

1-Feb-07 3:03

Hi All
I am making one console application.
I am using getche() function to retrieve a character from console input buffer.
Now I am getting unhandled exception when I run the code.
I am aslo using standard handle for input and output for some other requirement.
I am wondering if these handles are causing problem.
I have removed these handle part from my code.
But still my console application is giving me the same problem.
I viewed call stack , it is showing me some "lock" problem.
So I restarted my computer but it has solved my problem only once.
Now i am again getting the same problem after restarting the computer.
Can anyone help in theis !!!!!!!!!!!

jhwurmbach1-Feb-07 3:05

1-Feb-07 3:05

sachin ahuja wrote:
I am using getche() function to retrieve a character from console input buffer.
Now I am getting unhandled exception when I run the code.

Just show the part of the code with the getch() and the exception.

"We trained hard, but it seemed that every time we were beginning to form up into teams we would be reorganised. I was to learn later in life that we tend to meet any new situation by reorganising: and a wonderful method it can be for creating the illusion of progress, while producing confusion, inefficiency and demoralisation."

-- Caius Petronius, Roman Consul, 66 A.D.

sachin ahuja1-Feb-07 4:12

1-Feb-07 4:12

int main(int argc, char* argv[])
{

//char szGetString[500];
string sData;
int Error;
int i = 0, j = 0;
COORD origin={0,0};
char sIniPath[100];
//DWORD NoOfCharRead;

int ch = getche();

//Initializing the application
if(SUCCESS != (Error = Initialize()))
printf("Error in initilaizing the application\n");

/* hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
if(INVALID_HANDLE_VALUE == hStdOut)
Error = ERR_HT_HANDLE;
GetConsoleScreenBufferInfo(hStdOut , &ConsoleScreenBufferInfoOutPut);

//Setting color for stdout
ConsoleScreenBufferInfoOutPut.wAttributes = FOREGROUND_GREEN;

SetConsoleTextAttribute(hStdOut ,ConsoleScreenBufferInfoOutPut.wAttributes);

//Setting color for stderr
/ *hStdErr = GetStdHandle(STD_ERROR_HANDLE);
if(INVALID_HANDLE_VALUE == hStdErr)
Error = ERR_HT_HANDLE;
GetConsoleScreenBufferInfo(hStdErr , &ConsoleScreenBufferInfo);
ConsoleScreenBufferInfo.wAttributes = FOREGROUND_RED;
SetConsoleTextAttribute(hStdErr ,ConsoleScreenBufferInfo.wAttributes); */

//Getting handle for input buffer
/* hStdIn = GetStdHandle(STD_INPUT_HANDLE);
if(INVALID_HANDLE_VALUE == hStdIn)
Error = ERR_HT_HANDLE;
*/

}

and the exception is
Unhandled exception in XXX.exe:0xC000005:Access violation

Re: getch() problem [modified]

toxcct1-Feb-07 4:14

toxcct

1-Feb-07 4:14

edit your message and use <pre></pre> tags around your code.

and try to use your debugger to figure where the code fails exactly...

[VisualCalc][Flags Beginner's Guide] | [Forums Guidelines][My Best Advice]

jhwurmbach1-Feb-07 5:23

1-Feb-07 5:23

sachin ahuja wrote:
A lot of code

Ok, where is the exception coming up?
Certainly not in the piece of code you showed. Most of it is commented out and the other part is not compiling because Initialize() is missing.

So, please use the debugger to find out which line is crashing and prepare a running, minimal program demonstrating the error.
And, as toxcct said, put your code in the pre - tags by marking it and then clicking on "pre". On your screen just above the line with the smilies.

I turned your code into a working mini-application:

#include <windows.h>
#include <conio.h>
#include <string>

int main(int argc, char* argv[])
{

	//char szGetString[500];
	std::string sData;
	int Error;
	int i = 0, j = 0;
	COORD origin={0,0};
	char sIniPath[100];
	//DWORD NoOfCharRead;
	const int ERR_HT_HANDLE = -1;
	CONSOLE_SCREEN_BUFFER_INFO ConsoleScreenBufferInfo;

	int ch = ::getche();

	//Initializing the application
	//if(SUCCESS != (Error = Initialize()))
	//	printf("Error in initilaizing the application\n");

	HANDLE hStdOut = ::GetStdHandle( STD_OUTPUT_HANDLE);
	if(INVALID_HANDLE_VALUE == hStdOut)	{
		Error = ERR_HT_HANDLE;
	}
	GetConsoleScreenBufferInfo(hStdOut , &ConsoleScreenBufferInfo);

	//Setting color for stdout
	ConsoleScreenBufferInfo.wAttributes = FOREGROUND_GREEN;

	SetConsoleTextAttribute(hStdOut ,ConsoleScreenBufferInfo.wAttributes);

	//Setting color for stderr
	HANDLE hStdErr = GetStdHandle( STD_ERROR_HANDLE);
	if(INVALID_HANDLE_VALUE == hStdErr)	{
		Error = ERR_HT_HANDLE;
	}
	GetConsoleScreenBufferInfo(hStdErr , &ConsoleScreenBufferInfo);
	ConsoleScreenBufferInfo.wAttributes = FOREGROUND_RED;
	SetConsoleTextAttribute(hStdErr ,ConsoleScreenBufferInfo.wAttributes);

	//Getting handle for input buffer
	HANDLE hStdIn = GetStdHandle(STD_INPUT_HANDLE);
	if(INVALID_HANDLE_VALUE == hStdIn)	{
		Error = ERR_HT_HANDLE;
	}

}

-- modified at 4:01 Friday 2nd February, 2007
!"§$%& includes missing

sachin ahuja1-Feb-07 17:34

1-Feb-07 17:34

my code is giving problem before initialze function is called.
it is giving me problem on 10th line number ( int ch = ::getche();).
The code crashes here only.
I have seen the call stack which is given below
NTDLL! 77f69ecd()
NTDLL! 77f5b2e6()
_lock(int) line 228 + 7 bytes ********The problem is basically here.
_getche() line 254 + 7 bytes
main(int, char * *) line 56 + 5 bytes
mainCRTStartup() line 206 + 25 bytes
KERNEL32! 77e735dd()

After debugging the application I came to know that there is some problem related to multi threaded.
I have checked all my project settings but all entries are for single threaded wherever required.

Please see initialize() function if it is required
int Initialize()
{
//File Opening
int Error = SUCCESS;
fp = fopen("C:\\log.txt","w");
if(fp == NULL)
{
Error = FAILURE;
printf("Error in opening file\n");
}
return Error;

}
But the code is not reaching here.
I am getting problem before this function.
Kindly see if the problem can be solved.
Thanks in advance.

jhwurmbach1-Feb-07 21:50

1-Feb-07 21:50

Even that can not be, as fp, your result of fopen(), would be undeclared.
Are you using fclose()?

But first and foremost:
When the first statement in your app crashes, there is something very rotten.
Are you doing some funny linking?

sachin ahuja5-Feb-07 1:29

5-Feb-07 1:29

Yeah I am able to solve this issue.
Actually I am linking two libraries in this project which are multi threaded.
And my application(console) was single threaded.
So i have made my application(console) also multithreaded.
Now it is working fine.

Thanks a lot for your kind support and time.

Good!

jhwurmbach5-Feb-07 4:54

use Unicode DLL to non unicode application

5-Feb-07 4:54

sachin ahuja wrote:
So i have made my application(console) also multithreaded.
Now it is working fine.

Great!;)
And thank you for giving feedback.

Multi/singlethreaded linking usually shows characteristic (but misleading) linker errors. But this...

Atul231-Feb-07 2:29

Atul23

1-Feb-07 2:29

Hi
ALL

I am creating unicode DLL i build it then i got zero errors but warning LNK4086: entrypoint "_wWinMainCRTStartup" is not __stdcall with 12 bytes of arguments;"

Atul

Re: use Unicode DLL to non unicode application

Hamid_RT1-Feb-07 20:55

Hamid_RT

1-Feb-07 20:55

See here[^] if helpfulls

WhiteSky

open program while boot windows

Max++1-Feb-07 2:22

Max++

1-Feb-07 2:22

How to write the code if want the program run every time while boot windows.

Maximilien1-Feb-07 2:58

Maximilien

1-Feb-07 2:58

have a look at services.

Maximilien Lincourt
Your Head A Splode - Strong Bad

David Crow1-Feb-07 2:58

David Crow

1-Feb-07 2:58

It will need to be a service.

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

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

Max++1-Feb-07 3:05

Max++

1-Feb-07 3:05

Please advise me the good article or link to learn it.

http://www.google.com/search?hl=en&q=how+to+write+windows+service[^]

David Crow1-Feb-07 3:21

David Crow

1-Feb-07 3:21

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

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