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I am super stuck and very frustrated. I have a simple date time control.
If I put in a date from 1970 on, everything works fine. If I put in a
date that is less than or includes 1969, the program crashes at the bottom
on the ASSERT line which is the last line of this code:
CTime::CTime(int nYear, int nMonth, int nDay, int nHour, int nMin, int nSec,
int nDST)
{
struct tm atm;
atm.tm_sec = nSec;
atm.tm_min = nMin;
atm.tm_hour = nHour;
ASSERT(nDay >= 1 && nDay <= 31);
atm.tm_mday = nDay;
ASSERT(nMonth >= 1 && nMonth <= 12);
atm.tm_mon = nMonth - 1; // tm_mon is 0 based
ASSERT(nYear >= 1900);
atm.tm_year = nYear - 1900; // tm_year is 1900 based
atm.tm_isdst = nDST;
m_time = mktime(&atm);
ASSERT(m_time != -1); // indicates an illegal input time
}
Looking at the call stack, the input is:
CTime::CTime(int 1960, int 6, int 3, int 0, int 0, int 0, int -1)
I tried changing the nDST to 0 or 1 and that doesnt stop the error from
coming.
Any ideas? Any chance I can email someone a small sample project that
keeps displaying this error?
Please, any response any one can give me will be greatly appreciated.
Sincerely,
Danielle Brina (an overworked graduate student)
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DanYELL wrote: If I put in a
date that is less than or includes 1969, the program crashes at the bottom
on the ASSERT...
A crash is vastly different than an assertion. You canot use a value any earlier than midnight, January 1970.
"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain
"There is no death, only a change of worlds." - Native American Proverb
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Its an assertion error in the timecore.cpp file (line 40). I did
alittle more research on the web and found:
// If timeptr references a date before midnight,
// January 1, 1970, or if the calendar time cannot be
// represented, mktime returns –1 cast to type time_t.
I cant believe I cant use a value earlier than 1970. Isnt there a
work around somehow? Im trying to prompt for the persons date of
birth which in this case is in the 1960's. Is there any way to use
a date before 1970?
Please, any response any one can give me will be greatly appreciated.
Sincerely,
Danielle Brina (an overworked graduate student)
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Use COleDateTime instead of CTime.
"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain
"There is no death, only a change of worlds." - Native American Proverb
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Wow! It worked. I dont know what I was thinking of using
CTime.
Thank you very much for you responses.
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time_t can't represent dates before midnight Jan 1 1970 because that is the date where time_t starts counting from. As the other replies said, you'll need to use a time type that doesn't have that restriction.
--Mike--
Visual C++ MVP 
LINKS~! Ericahist | NEW!! PimpFish | CP SearchBar v3.0 | C++ Forum FAQ
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Michael Dunn wrote: time_t can't represent dates before midnight Jan 1 1970
And it cannot represent time after January 19 2038. This is where time_t reaches it's max limit.
Nibu thomas
Software Developer
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CALL <JMP.&DllDemo.ExpFun><br />
PUSH 0<br />
MOV DWORD PTR DS:[40997C],EAX<br />
MOV ECX,DWORD PTR DS:[EAX]<br />
PUSH 0<br />
PUSH 0<br />
PUSH 0<br />
CALL DWORD PTR DS:[ECX+4]<br />
ADD ESP,10
int ExpFun()
{
return 0;
}
int fun1(...)
{
...
}
how to write the fun1 declare and the ExpFun return value? the return value will confirm fun1 address (CALL DWORD PTR DS:[ECX+4] -> call fun1)
thanks. ![Rose | [Rose]](https://www.codeproject.com/script/Forums/Images/rose.gif)
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I do not see it at the top anymore...?
Peace!
-=- James
If you think it costs a lot to do it right, just wait until you find out how much it costs to do it wrong!
Avoid driving a vehicle taller than you and remember that Professional Driver on Closed Course does not mean your Dumb Ass on a Public Road!
DeleteFXPFiles & CheckFavorites (Please rate this post!)
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James R. Twine wrote: I do not see it at the top anymore...?
Peace!
Change your "Messages since" option appropriately. I think there was a server reset or something, because for me, it went back to "Last month's posts" for all the forums.
Regards,
Nish
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It is appearing now - I have changed nothing! 
Peace!
-=- James
If you think it costs a lot to do it right, just wait until you find out how much it costs to do it wrong!
Avoid driving a vehicle taller than you and remember that Professional Driver on Closed Course does not mean your Dumb Ass on a Public Road!
DeleteFXPFiles & CheckFavorites (Please rate this post!)
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For me, it only appears after I have posted something.
"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain
"There is no death, only a change of worlds." - Native American Proverb
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what is private & static function in MFC.
how it can be used in Visual C++.
what i need to do if i want to used the same filename in every block of programming like:
CMyPsmDlg::OnButtonBrowse()
{
//i get a filename using GetFileName()
}
CMyPsmDlg::OnButtonEncrypt()
{
//i want to use the same filename in above blok of function
}
HelpMe
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private and static are C++ concepts, and nothing to do with MFC per se. You need to get a good C++ book and figure out some of this basic stuff before working with MFC. The following URL is a good place to begin : http://www.parashift.com/c++-faq-lite/[^]
Regards,
Nish
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whenever Nish is right saying you should learn C++ first, i'll give it a go, so that every one can share.
as you certainly know, private members can be used from within the class only. private data members can be used only by member functions of the class, and private member functions can be called only by other member functions of the same class.
static only means that the function don't get the implicit this pointer parameter which is caracteristic of the non-static member functions. a static member function can only access static data members so, because they are not proper to an object but shared commonly by all the instances of the class. this have nothing to do with the scope, and nothing forbids a private member function to be static.
it will be able to be called only by member functions (as it is private), and will access only static data members (because of its static state).
don't make the confusion anyway, MFC is not a specific language. everything done inside MFC is pure C++. MFC simply provides some classes and functionnalities to ease Windows programming.
hope this helps...
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In the header file for your dialog class, declare a member variable of type CString to save the filename:
class CMyPsmDlg : public CDialog {
CString FileName;
};
void CMyPsmDlg::OnButtonBrowse()
{
FileName = GetFileName();
}
void CMyPsmDlg::OnButtonEncrypt()
{
}
Software Zen: delete this;
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what made you compare private and static functions?
private , protected and public are access specifiers. and on the other hand when a function is said static , it is STATIC, in the sense, its not intialized a new when New objects are created. but no matter it is private, public or protected, a new instance of those functions are created for the Object. static functions remain same no matter who calls it. it's acessed by :: instead of a . or ->
VuNic
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Hi,....
How do we add HOTKEY to an application runing in the system tray..the application is written in SDK....The application is "Magnifying Glass " by
"Alex Fr "....I want to use this application...and i want to add HOTKEY to this application so that i can activate the Application by HOTKEY instead of MouseClick.Please help me thank q.............
James Rocky.
-- modified at 11:08 Tuesday 7th March, 2006
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Yeah i know the functions to use but....i don`t to use them the "Magnifying Glass" application the URL is :
"http://www.codeproject.com/dialog/magnifyglass.asp"
can any one help me ....
-- modified at 11:52 Tuesday 7th March, 2006
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I'm writing and reading formatted io to a file using fopen, fscanf, fseek and fprintf. Even though I'm fprintf'ing the same formatted floats and int's each time to line #1, the varying size of the numbers makes it difficult to position the file pointer at the beginning of the next line, line #2. I'm using only the first 2 lines in the file, the line #1 for status that I write and line #2 for requests that I read and overwrite depending on the data.
My general question is:
How can I reliably position the file pointer at the beginning of the second line for reading (and writing) regardless of the varying length of the first status line.
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ronwurster wrote: Even though I'm fprintf'ing the same formatted floats and int's each time to line #1, the varying size of the numbers...
What does the fprintf() statement look like?
ronwurster wrote: How can I reliably position the file pointer at the beginning of the second line for reading (and writing) regardless of the varying length of the first status line.
Read the first line, and then the file pointer will be positioned at the beginning of the second line.
"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain
"There is no death, only a change of worlds." - Native American Proverb
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I would like to explain that I haven't used formatted file io much with C. Hence my ignorance about the different methods for doing this sort of thing.
I've changed the printf to use explicit formatting characters which allow me to maintain a fixed length line. So, I can now predictably "fseek" the position of the 2nd line. My fprintf line now looks like:
fprintf (stream,"%8.3f %8.3f %c %c %8.3f 4d", floatvar1, floatvar2,
charvar1, charvar2, intvar1);
However, I tried reading the first line (using fscanf) and the pointer was NOT positioned at the beginning of the second line. In fact it was not on the 2nd line at all. Did you mean I should use "fread"? Can you explain please.
Thanks for your help
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ronwurster wrote: However, I tried reading the first line (using fscanf) and the pointer was NOT positioned at the beginning of the second line. In fact it was not on the 2nd line at all. Did you mean I should use "fread"? Can you explain please.
char szLine[128];
fscanf(pFile, "%[^\n]\n", szLine); You can also use fgets().
"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain
"There is no death, only a change of worlds." - Native American Proverb
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Dumb ideea..but here goes:
for getting the second line start position
1. do a fseek to SEEK_SET
2.do a read the entire first line (fgets )
you are now at the end of first line->beginning of the first.
I don't know if this will work for you (it gets you to the seccond line but i don't know it it is suitable for your code).
Another ideea is to use predefined spaces for your numbers: fprintf(file,"%7d",24)uses 7 spaces(don't know if spaces is the appropiate word) to print the number 24 and alings it to the right. So, if you know how many numbers you have on the first line and you use enough spaces so they don't overflow...you will know the length of the first line which enables you to reposition to the begining of the second line.
Don't know if this helps (sorry for my english...it is not what i hoped it to be  )
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