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Using localtime_s to create a timestamp? And using asctime_s. C++


Using localtime_s to create a timestamp? And using asctime_s. C++

By : user2948827
Date : November 15 2020, 06:54 AM
this one helps. The first problem is you are not passing enough arguments to localtime_s. It requires two arguments but you are only passing one. The first argument should be a pointer to tm and the second a pointer to a time_t. The second problem is that the return type is errno_t not a pointer to tm. Your code for acquiring the current time should actually be:
code :
time_t rawtime;
tm timeinfo;
errno_t result = localtime_s(&timeinfo, &rawtime);
cout << "Current local time and date: " << timeinfo << endl;
cout << "Current local time and date: " << asctime(&timeinfo) << endl;


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Is there a function like asctime_s() that works for SYSTEMTIME structures in windows?

Is there a function like asctime_s() that works for SYSTEMTIME structures in windows?


By : WhiskeyBear
Date : March 29 2020, 07:55 AM
I hope this helps . GetDateFormat can be used for this. It can format the date using the appropriate format for a given locale. Below code shows how to use it for the user's default locale, in short format.
code :
char timebuf[26];
GetDateFormat(LOCALE_USER_DEFAULT, 
              DATE_SHORTDATE,
              &sysTime,
              NULL,
              timebuf, 
              ARRAYSIZE(timebuf));
how to use localtime_s with a pointer in c++

how to use localtime_s with a pointer in c++


By : soundarya sakthivel
Date : March 29 2020, 07:55 AM
I hope this helps . It looks like you're using Visual C++, so localtime_s(&newtime,&now); fills in the newtime struct with the numbers you want. Unlike the regular localtime function, localtime_s returns an error code.
So this is a fixed version of the function:
code :
int getMonth()
{
    struct tm newtime;
    time_t now = time(0);
    localtime_s(&newtime,&now);
    int Month = 1 + newtime.tm_mon;
    return Month;
}
get current date with localtime_s

get current date with localtime_s


By : toronja
Date : March 29 2020, 07:55 AM
I wish this helpful for you The time_t variable should be initialized with time(&rawtime) such that localtime_s can use it to properly fill out the struct. Much like your very first line time_t t = time(0), it's required that you initialize the variable with the time function and pass it a null parameter (0) or a pointer to the variable (&rawtime).
Unfortunately allocating a time_t var within memory does not automatically calculate the time since Epoch. Here's a question that addresses the same problem, except it has an example of the code you're looking for.
'localtime_s': is not a member of 'std' in VS2015

'localtime_s': is not a member of 'std' in VS2015


By : qobacha lethula
Date : March 29 2020, 07:55 AM
may help you . Per [headers]/10
code :
::localtime_s(&tm, &time);
localtime vs localtime_s and appropriate input arguments

localtime vs localtime_s and appropriate input arguments


By : Swati Srivastava
Date : March 29 2020, 07:55 AM
Any of those help localtime returns a pointer to a statically allocated struct tm.
With localtime_s, you pass in a pointer to a struct tm, and localtime_s writes its result data into that, so your code would change from:
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