How to define a structure in C++

gistfile1.txt

#include <iostream>
#include <string>
#include <iomanip>
using namespace std;

struct time_of_day
{
	int sec;
	int min;
	int hour;
};

void print_time(time_of_day time)
{
	cout << setw(2) << setfill('0') << time.hour << ":";
	cout << setw(2) << setfill('0') << time.min << ":";
	cout << setw(2) << setfill('0') << time.sec << endl;
}

int main()
{
	time_of_day start_work;
	start_work.hour = 8;
	start_work.min = 30;
	start_work.sec = 12;

	time_of_day end_work;
	end_work.hour = 17;
	end_work.min = 0;
	end_work.sec = 30;

	print_time(start_work);
	print_time(end_work);

	system("pause");
	return 0;
}