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While it's certainly possible to add MFC support to an existing Win32 Application, it would be much easier to just use AppWizard to create an MFC Exe application instead.
"A good athlete is the result of a good and worthy opponent." - David Crow
"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne
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Hello,
I am using CDatabase 's pen function t pen a database .Now I want to flag a message if the database desn't exist or it is not opening.
CDatabase::Open() does not return true r false so tried using try catch throw but the control does not go to catch part of the above block
What do I do ? I did the following
try
{
if (!CurrentDatabase.IsOpen())
CurrentDatabase.Open(_T(DatabaseName),FALSE,FALSE,_T("ODBC;"));
}
catch (CFileException* e)
{
AfxMessageBox("Check your Database");
throw;
}
Regards
Prithaa
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As far as I am aware, CDatabase class will throw a Database exception (CDBException) and not CFileException.
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Hello,
Thanks ,It worked.
I should have checked that.
Prithaa
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You can find VC++ Interview Questions and Answers on all
topics Such as
<b>C++, MFC, Win32, COM, DCOM, STL, Multi-Threading, UML, OOAD,
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</b>
Most Frequently Asked VC++ Interview Questions and
Answers collected from more than 100 real time interviews
and tests can be found at following link.
http://sumedh.shende.googlepages.com/
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no advertisement on forum are allowed dude!
"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
Never mind - my own stupidity is the source of every "problem" - Mixture
cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
Support CRY- Child Relief and You
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It seems that his thread is a news but why he use of question icon instead news icon.!
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thats great
this site is for helping people
if anybody does not want help then no need to raed that
and if anybody want then go and read that
i appreciate MR. textsumedh that is great job sir
and keep going
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are you stupid , there is nothing.. p_ who are you i have never seen you here.. great!
"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
Never mind - my own stupidity is the source of every "problem" - Mixture
cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
Support CRY- Child Relief and You
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I am creating activex control in vc++6.0. I need to implement MyRegisterClass in my control class. Can anyone let e know how to implement it.
S.Yamini
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Ok if I have a number (stored in a regular integer) and say that number is 51.... Is there a function to search the Integer and return how many numbers there are in the Integer? e.g. 51 has a 5 and a 1 in it so it should return 2.
I tried -> sprintf(IntLength, "%d", Prime); but I get compilation errors  does anyone have any ideas?
Thanks of course in advance 
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Here sprintf() will convert your prime integer to the string representation. so it will not give you your answer that how many numbers in integer.
And Regarding to your error , check the type of variable IntLength used in sprintf() function.
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technically you are not 100% correct. the return value of sprintf() is the number of characters stored in buffer so adapting the answer to the previous question Michael asked given by Naveen.R here[^] you could end up with
<br />
int IntLength;<br />
int n = 123456;<br />
char c[33] = {0};<br />
IntLength = sprintf( c, "%d", n ); <br />
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Michael101 wrote: sprintf(IntLength, "%d", Prime);
Whats the error?
any way you can use the following function for it
int n = 12345678;<br />
int nCount = 1;<br />
while( n )<br />
{<br />
n = n/10;<br />
if( n > 0 )<br />
{<br />
nCount++;<br />
}<br />
}
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Naveen.R wrote: nave
you are superfast dude!
"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
Never mind - my own stupidity is the source of every "problem" - Mixture
cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
Support CRY- Child Relief and You
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int iCount = 0;
int iurNumber= any number;
while(iurNumber !=0)
{
iurNumber /=10;
iCount++;
}
iCount will contain number of element integer have
"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
Never mind - my own stupidity is the source of every "problem" - Mixture
cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
Support CRY- Child Relief and You
|
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Michael101 wrote: ...but I get compilation errors...
Are we supposed to guess what those are?
"A good athlete is the result of a good and worthy opponent." - David Crow
"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne
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I've never seen sprintf with this signature. Have you overloaded it yourself?
I think the error you are getting is because you are passing an integer instead of a char*.
Instead of:
sprintf(IntLength, "%d", Prime);
use:
IntLength = sprintf( someCharBuffer, "%d", Prime );
Or better yet, use one of the other solutions already given.
David
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Hi everyone,
I'm working on a solution and I've come accross a problem which seems to be trickier than I expected! I've got an Integer and I need to put the numbers from that Integer into a character array! This array is used for other operations but I don't know how to extract the numbers in the Integer and place them in their own single element in the array. E.g. 47 needs to be over two diffent elements and so on.
Any ideas?
Thanks in advance, I appreciate the help
Michael
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check the sprintf() function.
eg:
int n = 123456;<br />
char c[33] = {0};<br />
sprintf( c, "%d", n );
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Legend 
Worked like a charm! Thanks
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you can also use itoa, _itot function!
"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
Never mind - my own stupidity is the source of every "problem" - Mixture
cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
Support CRY- Child Relief and You
|
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You can use
#include <strstream>
const int number = 47;
std::stringstream stream;
stream << number;
std::string numberAsString = stream.str(); This way, you are using the power of the STL for you, and are avoiding literally thousands of error possibilities when fiddeling around with char-pointers and string lenghts.
The std::string would fit in nicely with the std::vector (or any oher standard container), and as a plus you can get the content as a plain old C-String by calling its c_str()-member.
Just to bring regular C++ to the mind, instead of this ugly 30+years old C code floating around here.
Though I speak with the tongues of men and of angels, and have not money, I am become as a sounding brass, or a tinkling cymbal.
George Orwell, "Keep the Aspidistra Flying", Opening words
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Hello,
I'm having a problem with my double precision variables right now, and I'm hoping someone out there will be able to give me a hint as to what's going on. The details are going to be a little sketchy simply because of the size and complexity of the application.
I have a function that tests to see if the double precision code is behaving properly. This function looks something like this.
void TestMath()<br />
{<br />
double kappa = -2.5316332141755993e-008;<br />
double cx;<br />
cx = (double)1.0 / (double)kappa;<br />
<br />
if (cx != -39500192.000000000){<br />
BREAK("MATH IS WORKING");<br />
}<br />
}
When this function is called from the main body of my application, it never hits the break. However, if the function is called from a thread I have spawned using CreateThread(), the break does get hit.
The value for cx should be -39500192.776766039, but it's being set to -39500192.000000000
And if I add the line
double cx2 = 1.0 / -2.5316332141755993e-008;
cx2 always equals -39500192.776766039 regardless of where I'm making the call.
Using the IDE and checking the value for kappa indicates that it's value is correctly being stored.
And again, if the function is called from a spawned thread, cx is evaluated to be
-39500192.776766039
To create the thread, I'm simply calling
handle = CreateThread( NULL, 0,(LPTHREAD_START_ROUTINE)threadProcess, parameter, 0, NULL);<br />
And the function declaration for the thread looks like this.
DWORD WINAPI threadProcess(void *param)
Does anyone have any suggestions as to what could be causing this behavior?
Thanks,
Adam
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