Превратить дату в минуты

#include <stdio.h>
#include <iostream>
 
int getDays( int month, int year )
{
  const int days[] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
  int result = -1;
 
  if( month < 0 || month > 11 )
    return result;
 
  result = days[ month ];
  if( year % 4 == 0 && ( year % 100 != 0 || year % 400 == 0 ))
    ++result;
 
  return result;
}
 
int main()
{
    unsigned long year1,day1,mounth1,hour1,minute1;
    unsigned long year2,day2,mounth2,hour2,minute2;
    double sum_minute1 = 0,sum_minute2 = 0;
    std::cin >> year1 >> mounth1 >> day1 >> hour1 >> minute1;
    std::cin >> year2 >> mounth2 >> day2 >> hour2 >> minute2;
    sum_minute1 += day1 * 24 * 60;
    sum_minute1 += mounth1 * getDays(mounth1 - 1,year1) * 24 * 60;
    if(year1%4)
        sum_minute1 += year1 * 525600;
    else
        sum_minute1 += year1 * 527040;
    sum_minute1 += minute1 + (hour1*60);
 
    sum_minute2 += day2 * 24 * 60;
    sum_minute2 += mounth2 * getDays(mounth2 - 1,year2) * 24 * 60;
    if(year2%4)
        sum_minute2 += year2 * 525600;
    else
        sum_minute2 += year2 * 527040;
 
    sum_minute2 += minute2 + (hour2*60);
 
    long int minute = sum_minute2 - sum_minute1;
    int count = 0;
    while(minute >= 15){
        count++;
        minute -= 15;
    }
    std::cout << count << std::endl;
    return 0;
}

#include <iostream>
#include <boost/date_time/gregorian/gregorian.hpp>
#include <boost/lexical_cast.hpp>
 
namespace gr = boost::gregorian;
namespace dt = boost::date_time;
 
int main()
{
   gr::date_period period(gr::date(2013, 10, 15), gr::date(dt::day_clock<gr::date>::local_day()));
   int days = boost::lexical_cast<int>(period.length());
   std::cout << "days: " << days << "\n";
   std::cout << "minuts: " << (days * 24 * 60) << "\n";
 
   return 0;
}

#include <iostream>
using namespace std;
 
int main()
{
    unsigned long long year1,day1,mounth1,hour1,minute1;
    unsigned long long year2,day2,mounth2,hour2,minute2;
    cin >> year1 >> mounth1 >> day1 >> hour1 >> minute1;
    cin >> year2 >> mounth2 >> day2 >> hour2 >> minute2;
    int count = 0;
    if (year2 > year1)
    {
        count = (year2 - year1)*35712;
        year1 = year2;
    }
    if (mounth2 > mounth1)
    {
        count+=(mounth2 - mounth1)*2976;
        mounth1 = mounth2;
    }
    if (day2 > day1)
    {
        count+=(day2 - day1)*96;
        day1 = day2;
    }
    if (minute1!=0)
        while (minute1!=15 && minute1!=30 && minute1!=45 && minute1!=60)
            ++minute1;
    while (year1!=year2 || mounth1!=mounth2 || hour1!=hour2 || minute1+15<=minute2)
    {
            ++count;
            if (minute1==60)
            {
                ++hour1;
                minute1 = 0;
                if (hour1==24)
                {
                    hour1==0;
                    ++day1;
                    if (day1==32)
                    {
                        day1 = 1;
                        ++mounth1;
                        if (mounth1==13)
                        {
                            ++year1;
                            mounth1 = 1;
                        }
                    }
                }
            }
            minute1+=15;
    }
    cout <<count <<endl;
    return 0;
}

#include <stdio.h>
#include <iostream>
#include <time.h>
 
//int getDays( int month, int year )
//{
//  const int days[] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
//  int result = -1;
 
//  if( month < 0 || month > 11 )
//    return result;
 
//  result = days[ month ];
//  if( year % 4 == 0 && ( year % 100 != 0 || year % 400 == 0 ))
//    ++result;
 
//  return result;
//}
 
int main()
{
    unsigned long year1,day1,month1,hour1,minute1;
    unsigned long year2,day2,month2,hour2,minute2;
    double sum_minute1 = 0,sum_minute2 = 0;
    std::cin >> year1 >> month1 >> day1 >> hour1 >> minute1;
    std::cin >> year2 >> month2 >> day2 >> hour2 >> minute2;
 
    time_t now =23;
    struct tm date1;
    struct tm date2;
    double seconds;
    date1.tm_hour = hour1;
    date1.tm_mon = month1;
    date1.tm_year = year1;
    date1.tm_min = minute1;
    date1.tm_mday = day1;
 
    date2.tm_hour = hour2;
    date2.tm_mon = month2;
    date2.tm_year = year2;
    date2.tm_min = minute2;
    date2.tm_mday = day2;
    std::cout << difftime(mktime(&date2),mktime(&date1));
//    sum_minute1 += day1 * 24 * 60;
//    sum_minute1 += mounth1 * getDays(mounth1 - 1,year1) * 24 * 60;
//    if(year1%4)
//        sum_minute1 += year1 * 525600;
//    else
//        sum_minute1 += year1 * 527040;
//    sum_minute1 += minute1 + (hour1*60);
 
//    sum_minute2 += day2 * 24 * 60;
//    sum_minute2 += mounth2 * getDays(mounth2 - 1,year2) * 24 * 60;
//    if(year2%4)
//        sum_minute2 += year2 * 525600;
//    else
//        sum_minute2 += year2 * 527040;
 
//    sum_minute2 += minute2 + (hour2*60);
 
//    long int minute = sum_minute2 - sum_minute1;
//    int count = 0;
//    while(minute >= 15){
//        count++;
//        minute -= 15;
//    }
//    std::cout << count << std::endl;
    return 0;
}