In std C++,How to get the Current time?

[CppNewer]

And Is there any class or method to manipulate Date or Time In standard C++?
-------Thank all

 

[Christopher]

-------Thank all

include the <ctime> header

look up:

time_t
GetTime()
tm
LocalTime()
or just a reference for <ctime>

 

[Ian Collins]

include the <ctime> header

look up:

time_t
GetTime()
tm
LocalTime()
or just a reference for <ctime>

Now of the above are standard C++ library functions, <ctime> defines
localtime, and gmtime which should serve the OP's requirements.

 

[Sam]

It's not C++, but rather POSIX.

See the time() and/or gettimeofday() man pages.


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[Christopher]

Now of the above are standard C++ library functions, <ctime> defines
localtime, and gmtime which should serve the OP's requirements.

time_t is standard and is defined in <ctime>
tm is standard and is also defined in <ctime>

However, I agree neither of these are standard _functions_, but they
are standard types that standard functions make use of.

LocalTime() is standard if you change to lowercase spelling, but I
didn't tell him to compile it, I told him to look it up.


I do admit, I mistook time() for GetTime() and GetTime() is not a
standard function. Use time() instead.
Better is to consult your reference for the <ctime> header, like I
said.

 

[Ian Collins]

It's not C++, but rather POSIX.

What isn't C++?

See the time() and/or gettimeofday() man pages.

time() is C++.

 

[Sam]

What isn't C++?

"Date or Time". There's no such thing called "Date or Time" in the C++
language.

time() is C++.

No, it's not. The latest C++ language speficiation, as defined by ISO/IEC
14882:2003, does not define any function called "time()".


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[Ian Collins]

No, it's not. The latest C++ language speficiation, as defined by
ISO/IEC 14882:2003, does not define any function called "time()".

See 20.5.

 

[Daniel T.]

And Is there any class or method to manipulate Date or Time In
standard C++?

http://www.dinkumware.com/manuals/default.aspx?manual=compleat&page=time.
html

 

[Jack Klein]

-------Thank all

Make up your mind, do you want to get the time or manipulate it? And
what do you mean by "manipulate" it?

C++ provides functions to get the current time and data, inherited
from C. It provides more inherited functions to convert the time into
text in various ways, for writing to a file or display.

It does not provide any functions for changing a computer's date or
time.

Consult your compiler's manual, on-line help, or man pages and look at
the function defined in <ctime> or <time.h>.

--
Jack Klein
Home: http://JK-Technology.Com
FAQs for
comp.lang.c http://c-faq.com/
comp.lang.c++ http://www.parashift.com/c++-faq-lite/
alt.comp.lang.learn.c-c++
http://www.club.cc.cmu.edu/~ajo/docs/FAQ-acllc.html

 

[red floyd]

"Date or Time". There's no such thing called "Date or Time" in the C++
language.


No, it's not. The latest C++ language speficiation, as defined by
ISO/IEC 14882:2003, does not define any function called "time()".

It's incorporated by reference from ISO/IEC 9899:1990.

 

[James Kanze]

"Date or Time". There's no such thing called "Date or Time" in
the C++ language.

No, it's not. The latest C++ language speficiation, as defined
by ISO/IEC 14882:2003, does not define any function called
"time()".

Funny, it's in my copy of the standard. Both the 1998 version
and the 2003 version (and the latest draft for the next
version).

Posix does extend it, of of course---gettimeofday() is Posix,
and not pure C++---but time(), localtime(), gmttime(), etc. are
part of the C++ standard.

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On the other hand, such add-ons are allowed in news according to
the NNTP standard.