time_t now = time(0); // get current time
struct tm* tm = localtime(&now); // get struct filled out
 
cout << "Today is " 
    << tm->tm_mon+1 // month
     << "/" << tm->tm_mday // day
      << "/" << tm->tm_year + 1900 // year with century
     << " " << tm->tm_hour // hour
     << ":" << tm->tm_min // minute
     << ":" << tm->tm_sec; // second

#include <iostream>
#include <ctime>
#include <sstream>
 
using std::cout;
using std::cin;
using std::endl;
using std::ostream;
using std::stringstream;
 
ostream& operator << (ostream&, const tm&);
 
tm mytime; // not quite safe
 
int main(){
 
 
 //   tm mytime; // safer implementation
    mytime.tm_mday = 10;
    mytime.tm_mon = 5;
    mytime.tm_year = 2008;
    mytime.tm_hour = 3;
    mytime.tm_min = 8;
    mytime.tm_sec = 30;
 
    cout << mytime << endl;
    cin.ignore();
    cin.get();
 
    return 0;
}
 
ostream& operator<<(ostream& out, const tm& theTime){
    stringstream ss1 (stringstream::in | stringstream::out);
    stringstream ss2 (stringstream::in | stringstream::out);
    ss1 << 0 << theTime.tm_min;
    ss2 << theTime.tm_min;
    out << theTime.tm_mon << "/" << theTime.tm_mday << "/" << theTime.tm_year;
    out << "\t" << theTime.tm_hour << ":" << ((theTime.tm_min < 10 )
                                             ?  ss1.str() : ss2.str() ) << ":" << theTime.tm_sec;
    return out;
}

#include <iostream>
#include <ctime>
 
using std::cout;
using std::cin;
using std::endl;
using std::ostream;
 
ostream& operator << (ostream&, const tm&);
 
tm mytime; // not quite safe
 
int main(){
 
 
 //   tm mytime; // safer implementation
    mytime.tm_mday = 10;
    mytime.tm_mon = 5;
    mytime.tm_year = 2008;
    mytime.tm_hour = 3;
    mytime.tm_min = 8;
    mytime.tm_sec = 30;
 
    cout << mytime << endl;
    cin.ignore();
    cin.get();
 
    return 0;
}
 
ostream& operator<<(ostream& out, const tm& theTime){
    out << theTime.tm_mon << "/" << theTime.tm_mday << "/" << theTime.tm_year;
    out << "\t" << theTime.tm_hour << ":" << (theTime.tm_min < 10 ? "0": "") << theTime.tm_min << ":";
    out << (theTime.tm_sec < 10 ? "0": "") << theTime.tm_sec;
    return out;
}

#include <iostream>
#include <ctime>
#include <iomanip>
 
using std::cout;
using std::cin;
using std::endl;
using std::ostream;
using std::setw;
using std::setfill;
 
ostream& operator << (ostream&,const tm&);
 
tm mytime; // not quite safe
 
int main(){
 
 
 //   tm mytime; // safer implementation
    mytime.tm_mday = 10;
    mytime.tm_mon = 5;
    mytime.tm_year = 2008;
    mytime.tm_hour = 3;
    mytime.tm_min = 8;
    mytime.tm_sec = 30;
 
    cout << mytime << endl;
    cin.ignore();
    cin.get();
 
    return 0;
}
 
ostream& operator<<(ostream& out,const tm& theTime){
    out << setfill('0') << setw(2) << theTime.tm_mon << "/" 
        << setw(2) << theTime.tm_mday << "/" 
        << setw(4) << theTime.tm_year;
    out << setfill('0') << setw(2) << "\t" 
        << setw(2) << theTime.tm_hour << ":" 
        << setw(2) << theTime.tm_min << ":";
    out << setfill('0') << setw(2) << theTime.tm_sec;
    return out;
}

#include <iostream>
#include <ctime>
#include <iomanip>
 
using std::cout;
using std::cin;
using std::endl;
using std::ostream;
using std::setw;
using std::setfill;
 
ostream& operator << (ostream&,const tm&);
 
tm mytime; // not quite safe
 
int main(){
 
 
 //   tm mytime; // safer implementation
    mytime.tm_mday = 10;
    mytime.tm_mon = 5;
    mytime.tm_year = 2008;
    mytime.tm_hour = 3;
    mytime.tm_min = 8;
    mytime.tm_sec = 30;
 
    cout << mytime << endl;
    cin.ignore();
    cin.get();
 
    return 0;
}
 
ostream& operator<<(ostream& out,const tm& theTime){
    out << setfill('0') << setw(2) << theTime.tm_mon << "/"
        << setw(2) << theTime.tm_mday << "/"
        << setw(4) << theTime.tm_year;
    out << "\t"<< setw(2) << setfill('0')
        << setw(2) << theTime.tm_hour << ":"
        << setw(2) << theTime.tm_min << ":";
    out << setfill('0') << setw(2) << theTime.tm_sec;
    return out;
}

#include <iostream>
#include <ctime>
 
double diffclock(time_t clock1,time_t clock2) //Using time_t & difftime
{
	double diffticks=difftime(clock1,clock2); 
	double diffms=(diffticks)/(CLOCKS_PER_SEC/1000);
	return diffms;
}
 
void ShowTheDate()	//Using time_t & struct tm
{
	time_t now = time(0); // get current time: sing time_t
	struct tm* tm = localtime(&now); // get struct filled out
	std::cout << "Today's exact date and time is " //Dragon's code works outside main
		<< tm->tm_mon+1 // month
		<< "/" << tm->tm_mday // day
		<< "/" << tm->tm_year + 1900 // year with century
		<< " " << tm->tm_hour // hour
		<< ":" << tm->tm_min // minute
		<< ":" << tm->tm_sec<<std::endl; // second
}
void FindWhichDayWillItbe (int days, int hours) //using mktime
{
	//the user gives the number of days and hours, and this function finds what day
	//is it going to be after these days and hours pass
	char *wday[] = { "Sunday", "Monday", "Tuesday", "Wednesday",
		"Thursday", "Friday", "Saturday" };
	time_t t1, t3;
	struct tm *t2;
	t1 = time(0);
	t2 = localtime(&t1);
	t2 -> tm_mday += days;
	t2 -> tm_hour += hours;
	t3 = mktime(t2);
	std::cout<<days<<" days and "<<hours<<" hours from now, it will be a "
		<<wday[t2 -> tm_wday];
}
 
int main()
{
	//1st Part
	time_t startTime,endTime;
	double elapsedTime;
	startTime = clock();
	for (int i = 0; i<1000;++i)
	{
		std::cout<<"hi 1000 times"<<std::endl;
	}
	endTime = clock();
	elapsedTime = diffclock(endTime,startTime);
	std::cout<<"The execution time of the for loop in msecs is = "<<elapsedTime<<std::endl;
	//2nd part
	ShowTheDate();
	//3rd part
	int noDays = 0;
	int noHours = 0;
	std::cout<<"Lets find out what day is it going to be after n days and x hours: "<<std::endl;
	std::cout<<"Give number of days: "<<std::endl;
	std::cin>>noDays;
	std::cout<<"Give number of hours: "<<std::endl;
	std::cin>>noHours;
	FindWhichDayWillItbe(noDays,noHours);
	return 0;
}