UTC Time Format in C++

#include <iostream>
#include <ctime>
using namespace std;

int main( )

{

// current date/time based on current system

time_t now = time(0);

// convert now to string form

char* dt = ctime(&now);

cout << "The local date and time is: " << dt << endl;

// convert now to tm struct for UTC
tm *gmtm = gmtime(&now);
dt = asctime(gmtm);
cout << "The UTC date and time is:"<< dt << endl;
}