The gmtime() is defined in <ctime> header file.
gmtime() Prototype
tm* gmtime(const time_t* time_ptr);
The gmtime() function takes a pointer of type time_t as its argument and returns a pointer object of type tm. The value returned by gmtime() function is the time at the GMT timezone.
Then, the hours, minutes and seconds can be accessed using tm_hour, tm_min and tm_sec respectively.
gmtime() Parameters
- time_ptr: pointer to a time_t object to be converted.
gmtime() Return value
- On success, the gmtime() function returns a pointer to a
tmobject. - On failure, a null pointer is returned.
Example: How gmtime() function works?
#include <iostream>
#include <ctime>
using namespace std;
int main()
{
time_t curr_time;
curr_time = time(NULL);
tm *tm_gmt = gmtime(&curr_time);
cout << "Current time : " << tm_gmt->tm_hour << ":" << tm_gmt->tm_min << ":" << tm_gmt->tm_sec << " GMT";
return 0;
}
When you run the program, the output will be:
Current time : 13:26:28 GMT
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