gmtime
From cppreference.com
| Defined in header
<time.h>
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Converts given time since epoch as time_t value into calendar time, expressed in Coordinated Universal Time (UTC).
Contents |
[edit] Parameters
| time | - | pointer to a time_t object to convert |
[edit] Return value
pointer to a static internal tm object on success, or NULL otherwise. The structure may be shared between gmtime, localtime, and ctime and may be overwritten on each invocation.
[edit] Notes
This function may not be thread-safe.
POSIX requires that this function sets errno to EOVERFLOW if it fails because the argument is too large.
[edit] Example
Run this code
#include <stdio.h> #include <time.h> #include <stdlib.h> int main(void) { time_t t = time(NULL); struct tm *tmptr = gmtime(&t); if (tmptr == NULL) { fprintf(stderr,"gmtime() failed in file %s at line # %d\n", __FILE__,__LINE__-3); exit(EXIT_FAILURE); } printf("UTC: %s", asctime(tmptr)); printf("local: %s", asctime(localtime(&t))); return EXIT_SUCCESS; }
Output:
UTC: Wed Oct 9 10:37:39 2013 local: Wed Oct 9 17:37:39 2013
[edit] See also
| converts time since epoch to calendar time expressed as local time (function) |
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C++ documentation for gmtime
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