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Which macro is more exact? __TIME__ or __TIMESTAMP__?


Which macro is more exact? __TIME__ or __TIMESTAMP__?

By : Thomas
Date : November 15 2020, 06:54 AM
around this issue I have the following little program: , The two macros do entirely different things:
GCC
code :


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What's the exact step of macro expanding?

What's the exact step of macro expanding?


By : castielle
Date : March 29 2020, 07:55 AM
Hope that helps When expanding a macro, the preprocessor expands the macro's arguments only if those arguments are not subjected to the stringizing (#) or token-pasting (##) operators. So, if you have this:
code :
#define stringify(x) #x
stringify(__LINE__)
#define stringify1(x) #x
#define stringify(x) stringify1(x)
stringify(__LINE__)
C preprocessor __TIMESTAMP__ in ISO 8601:2004

C preprocessor __TIMESTAMP__ in ISO 8601:2004


By : Rasmus Sorensen
Date : March 29 2020, 07:55 AM
this will help Oh ye optimist! You wouldn't really expect one standard to pay attention to another, would you? The __TIMESTAMP__ define is not in standard C, just so as you are aware. It would be great to have a format like your proposed __TIMESTAMP_ISO__ (would you always want Zulu time, or would it be better to have the local time zone offset?), but frankly, the easiest way to get it added might be a patch to GCC and Clang and so on.
You can try monkeying with asctime() as suggested by user1034749's answer, but I'd rather not try that.
code :
gcc ... -Wno-builtin-macro-redefined -D__TIMESTAMP__=$(date +'"%Y-%m-%dT%H:%M:%S"') ...
$ gcc -std=c99   -Wall -Wextra  -O xx.c -o xx
$ ./xx 
Fri Jul  5 19:56:25 2013
$ gcc -std=c99 -Wall -Wextra -D__TIMESTAMP__=$(date +'"%Y-%m-%dT%H:%M:%S"') -O xx.c -o xx  
<command-line>: warning: "__TIMESTAMP__" redefined
$ ./xx
2013-07-05T20:10:28
$
#include <stdio.h>

int main(void)
{
    printf("%s\n", __TIMESTAMP__);
    return 0;
}
Can't specify the exact range in Excel vba macro

Can't specify the exact range in Excel vba macro


By : user2289075
Date : March 29 2020, 07:55 AM
wish help you to fix your issue Today is my first day fighting the VBA macros in Excel. All I want to do is to specify a column, get the distinct values from it and copy them in another column, found on a different sheet. I was reading a lot and this is what I came up with : , Just qualify Cells():
code :
Sub TestS()
    Dim lastRow As Long
    With Worksheets(3)
        lastRow = .Range("A" & Rows.Count).End(xlUp).Row
        .Range(.Cells(1, 1), .Cells(lastRow, 1)).AdvancedFilter _
            Action:=xlFilterCopy, _
            CopyToRange:=Worksheets(2).Range("A3"), Unique:=True
    End With
End Sub
Macro __TIMESTAMP__ gets stuck

Macro __TIMESTAMP__ gets stuck


By : user3549460
Date : March 29 2020, 07:55 AM
like below fixes the issue As per @SebastianPhilipp's comment, __TIMESTAMP__ represents the time at which the executable was compiled. As an alternative, I would recommend looking at functions such as ctime() and asctime()
Is __TIME__ preprocessor macro guaranteed to be constant within a file?

Is __TIME__ preprocessor macro guaranteed to be constant within a file?


By : Paranoid_Android
Date : March 29 2020, 07:55 AM
To fix this issue C does not rigorously specify the the " time of translation" is constant throughout a pre-processing/compilation.
My experience has been it is constant. But since it is only to the second, a given compilation would need to cross a second boundary to differ.
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