How can I get the current date or time of day in a C program?

Q

How can I get the current date or time of day in a C program?

✍: Guest

A

Just use the time, ctime, localtime and/or strftime functions. Here is a simple example:
#include <stdio.h>
#include <time.h>

int main()
{
time_t now;
time(&now);
printf("It's %s", ctime(&now));
return 0;
}

Calls to localtime and strftime look like this:

struct tm *tmp = localtime(&now);
char fmtbuf[30];
printf("It's %d:%02d:%02d\n",
tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
strftime(fmtbuf, sizeof fmtbuf, "%A, %B %d, %Y", tmp);
printf("on %s\n", fmtbuf);

(Note that these functions take a pointer to the time_t variable, even when they will not be modifying it.

2015-08-07, 660👍, 0💬