C / C++ / MFC

help with some date/time input pls

29-Jun-05 6:47

I don't see it documented, but you might find something in one of these articles:

SHFileOperation always returns OK[^]

CShellFileOp - Wrapper for SHFileOperation[^]

SHFILEOPSTRUCT and the SHFileOperation[^]

In any case, I suggest you use other more documented and flexible alternatives, like CopyFileEx, MoveFileEx, etc.

--
jlr
http://jlamas.blogspot.com/[^]

neodeaths29-Jun-05 4:07

29-Jun-05 4:07

hi i am new to c++ and i would like to know how i can put date into a varieble called a
and time into a varieble called b like(DDMMYY) and (2400)

^^ me noob

David Crow29-Jun-05 4:29

29-Jun-05 4:29

Something like:

int a = 290605;
int b = 0929;

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

neodeaths29-Jun-05 4:49

29-Jun-05 4:49

i mean how to let the program automaticly store todays date and the current time into the varieble when the that line of code is being runed

Ravi Bhavnani29-Jun-05 5:10

Ravi Bhavnani

29-Jun-05 5:10

See CTime() - specifically CTime::GetCurrentTime().

/ravi

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David Crow29-Jun-05 5:24

29-Jun-05 5:24

Check out the time() function.

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

neodeaths29-Jun-05 14:13

29-Jun-05 14:13

so do i put it this way?

#include <iostream>
using namespace std;

int time;

int main (void)
{
time = CTime();
return 0;
}
but i tryed tis and i dosnt work pls giv me an example pls

David Crow29-Jun-05 16:58

29-Jun-05 16:58

nneodeath wrote:
so do i put it this way?

What does the compiler say?

nneodeath wrote:
time = CTime();

CTime is an MFC class. To instantiate one, use:

CTime time;

To construct one with the current date and time, use

CTime time = CTime::GetCurrentTime();

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

neodeaths2-Jul-05 9:40

2-Jul-05 9:40

i tryed it but i doesnt really work could u please show me what i am doing wrong

#include <iostream>
using namespace std;
CTime time;

int main (void)
{
CTime time = CTime::GetCurrentTime();
cout << time << endl;
return 0;
}

this is my code pls help me correct it so that the date and time goes like this

time variebles
HHMM <==this order

date variebles
DDMMYY<==this order

David Crow2-Jul-05 12:07

2-Jul-05 12:07

nneodeath wrote:
cout << time << endl;

Use:

cout << time.Format("%x") << endl;

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

neodeaths2-Jul-05 17:50

2-Jul-05 17:50

#include<iostream>
using namespace std;

CTime time;

int main (void)
{
CTime time = CTime::GetCurrentTime();
//cout << time << endl;
cout << time.Format(time) << endl;
return 0;
}

the outcome:

--------------------Configuration: tiemsam - Win32 Debug--------------------
Compiling...
tiemsam.cpp
C:\Documents and Settings\nick\Desktop\currently doing cpp project\tiemsam.cpp(4) : error C2146: syntax error : missing ';' before identifier 'time'
C:\Documents and Settings\nick\Desktop\currently doing cpp project\tiemsam.cpp(4) : error C2501: 'CTime' : missing storage-class or type specifiers
C:\Documents and Settings\nick\Desktop\currently doing cpp project\tiemsam.cpp(4) : fatal error C1004: unexpected end of file found
Error executing cl.exe.

tiemsam.exe - 3 error(s), 0 warning(s)

please help me see wats the problem

David Crow4-Jul-05 11:42

Number of bytes in a mbcs string

4-Jul-05 11:42

Why do you have two CTime variables?

nneodeath wrote:
cout << time.Format(time) << endl;

This is wrong. See my previous post.

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Chintoo72329-Jun-05 3:28

29-Jun-05 3:28

how do you find the number of bytes in a multibyte string?

_mbslen and _mbstrlen return the number of characters in the string, according to: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vccore98/html/_crt_strlen.2c_.wcslen.2c_._mbslen.2c_._mbstrlen.asp[^]

With _MBCS defined, size of TCHAR is 1 byte, so you cant even multiply _tcslen with this.

RChin29-Jun-05 4:40

RChin

29-Jun-05 4:40

Flace wrote:
With _MBCS defined, size of TCHAR is 1 byte, so you cant even multiply _tcslen with this

I'm confused by this statement. But the number of occupied bytes in your string will be :

<br />
int nBytes = (_tcslen(pszString) * sizeof(TCHAR));<br />

The sizeof() will return the number of bytes occupied per character. This will obviously vary depending if you are working in single byte or double byte character mode.

I Dream of Absolute Zero

Jose Lamas Rios29-Jun-05 4:41

29-Jun-05 4:41

If you know you have a multibyte string, you can simply use strlen() to obtain the number of bytes.

void SomeFunction(LPSTR pString)
{
	int nChars = _mbslen(pString);
	int nBytes = strlen(pString);
	[...]
}

If you are using the TCHAR macros you can do it like this:

void SomFunction(LPTSTR pString)
{
	int nChars = _tcsclen(pString);
	int nBytes = _tcslen(pString) * sizeof(TCHAR);
}

Note _tcslen is different than _tcsclen.

If _UNICODE is not defined, _tcslen resolves to strlen, and sizeof(TCHAR)==1.
If _UNICODE is defined, _tcslen resolves to wcslen, and sizeof(TCHAR)==2.

So, _tcslen(pString) * sizeof(TCHAR) will give you the number of bytes in any case.

Hope that helps,

--
jlr
http://jlamas.blogspot.com/[^]

Chintoo72329-Jun-05 4:54

29-Jun-05 4:54

Jose Lamas Rios wrote:
If you know you have a multibyte string, you can simply use strlen() to obtain the number of bytes.

can you not have a NULL in the middle of a multi-byte string?

Jose Lamas Rios wrote:
If _UNICODE is not defined, _tcslen resolves to strlen, and sizeof(TCHAR)==1.
If _UNICODE is defined, _tcslen resolves to wcslen, and sizeof(TCHAR)==2.
So, _tcslen(pString) * sizeof(TCHAR) will give you the number of bytes in any case.

If _UNICODE is not defined, and _MBCS is defined, _tcslen resolves to _mbslen. And you know, _MBCS is defined by default in the project settings. So, _tcslen(pString) * sizeof(TCHAR) will not always give you the number of bytes all the time...

Jose Lamas Rios29-Jun-05 5:04

29-Jun-05 5:04

Flace wrote:
can you not have a NULL in the middle of a multi-byte string?

No, you can't. That's why I say strlen() works fine in this case.

Flace wrote:
If _UNICODE is not defined, and _MBCS is defined, _tcslen resolves to _mbslen

Not really. If _UNICODE is not defined, and _MBCS is defined, _tcsclen does resolve to _mbslen, but _tcslen still resolves to strlen. You can check it here:

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vclib/html/_crt_strlen.2c_.wcslen.2c_._mbslen.2c_._mbstrlen.asp[^]

--
jlr
http://jlamas.blogspot.com/[^]

Andrew Kirillov29-Jun-05 4:58

Andrew Kirillov

29-Jun-05 4:58

Two above posts are correct, except only the one thing. As MSDN says :
"these functions returns the number of characters in string, excluding the terminal NULL."

So, I suppose, the correct answer on the question will be
(_tcslen(str) + 1) * sizeof(TCHAR)

Andrew

Jose Lamas Rios29-Jun-05 5:07

any limitations to VTable ???

29-Jun-05 5:07

You are right, of course. I stand corrected.

--
jlr
http://jlamas.blogspot.com/[^]

Abhi Lahare29-Jun-05 3:24

Abhi Lahare

29-Jun-05 3:24

Hi all,

Can I make a variable argrument function like foofunc(char*, const char *,...); as a virtual function in C++ class.?.

Thanks in Advance
Abhi Lahare

Re: any limitations to VTable ???

C^hris L^osinger29-Jun-05 3:33

C^hris L^osinger

29-Jun-05 3:33

yes , you can make a virtual variable argrument function.

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Re: any limitations to VTable ???

Chintoo72329-Jun-05 3:41

Re: any limitations to VTable ???

29-Jun-05 3:41

I dont have a compiler to test this right now, but c++ allow the following two to be present simultaneously? My guess is No. How about the first one in the base class and the second on in the derived class? Myy guess again is no, but this time I am less confident. Can someone clarify with reasons?

foofunc(char*, const char *,...);
foofunc(char*, const char *, int);

Chintoo72329-Jun-05 3:42