Convert GMT to EST; HELP!

So, I have an assignment for my coding class and can't seem to figure out why it's outputting the wrong time! I think it has something to do with the time zones...no, i KNOW it has to do with that, but I don't know how to fix it. I've looked online and no one seems to use the code we use. If anybody could help, that'd be awesome. Also, I am trying to figure out how to insert a "0" in front of any single-digit value. For example, if the time is 12:03, I want the minutes place to display "03" and not "3" This is extra credit so I really don't mind if you don't answer that part of the question, but I would appreciate any and all help!

My current code:

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

int main()
{
	int totalSeconds = time(0);
	int currentSecond = totalSeconds % 60;
	int totalMinutes = totalSeconds / 60;
	int currentMinute = totalMinutes % 60;
	int totalHours = totalMinutes / 60;
	int currentHour = totalHours % 12;
	cout << "The current time is: " << currentHour << ":"<< currentMinute << ":" << currentSecond << " GMT" <<
		endl;

system("PAUSE");
}