C Program to Display time in Different Country Format

// C program to display time
// in the different country formats
#include <stdio.h>
#include <string.h>

void singapore();
void newyork();
void china();
void japan();
void saudiarabia();
long int h, m, s, n, s1, s2, s3, t, 
         x, sec, p, hrs, min, r, q;

// Driver code
void main()
{
  printf("\n Enter Time in hours minutes and seconds "
         "respectively: ");
  scanf("%ld%ld%ld", &h, &m, &s);

  if (h > 24 || m > 60 || s > 60) 
  {
    printf("\n oops!!! U have Entered an invalid "
               "format of time");
  }
  else 
  {
    s1 = h * 3600;
    s2 = m * 60;
    s3 = s;
    
    // convert total time in seconds
    t = s1 + s2 + s3; 
    printf("\n Time in INDIA is %ld:%ld:%ld i.e. , %ld "
           "hours %ld minutes %ld seconds",
            h, m, s, h, m, s);
  }

  printf("\n");
  singapore();
  printf("\n");
  newyork();
  printf("\n");
  china();
  printf("\n");
  japan();
  printf("\n");
  saudiarabia();
}

void singapore()
{
  // Singapore time is 2:30 hrs
  // ahead of India
  // 2:30 hrs = 9000 seconds
  r = t + 9000; 
  
  // 24hrs = 86400 seconds
  if (r > 86400) 
  {
    q = r - 86400;
    sec = q % 60;
    p = q / 60;
    hrs = p / 60;
    min = p % 60;
    printf("\n Time in SINGAPORE is %ld:%ld:%ld i.e., "
           "%ld hours %ld minutes %ld seconds",
            hrs, min, sec, hrs, min, sec);
  }
  else if (r < 86400 && r > 0) 
  {
    sec = r % 60;
    p = r / 60;
    hrs = p / 60;
    min = p % 60;
    printf("\n Time in SINGAPORE is %ld:%ld:%ld i.e., "
           "%ld hours %ld minutes %ld seconds",
            hrs, min, sec, hrs, min, sec);
  }
  else 
  {
    x = 86400 + r;
    sec = x % 60;
    p = x / 60;
    hrs = p / 60;
    min = p % 60;
    printf("\n Time in SINGAPORE is %ld:%ld:%ld i.e., "
           "%ld hours %ld minutes %ld seconds",
            hrs, min, sec, hrs, min, sec);
  }
}

void newyork()
{
  // Newyork time is 10:30 hrs behind of India
  // 10:30hrs = 37800 seconds
  r = t - 37800; 
  if (r > 86400) 
  {
    q = r - 86400;
    sec = q % 60;
    p = q / 60;
    hrs = p / 60;
    min = p % 60;
    printf("\n Time in NEWYORK is %ld:%ld:%ld i.e., "
           "%ld hours %ld minutes %ld seconds",
            hrs, min, sec, hrs, min, sec);
  }
  else if (r < 86400 && r > 0) 
  {
    sec = r % 60;
    p = r / 60;
    hrs = p / 60;
    min = p % 60;
    printf("\n Time in NEWYORK is %ld:%ld:%ld i.e., "
           "%ld hours %ld minutes %ld seconds",
            hrs, min, sec, hrs, min, sec);
  }
  else 
  {
    x = 86400 + r;
    sec = x % 60;
    p = x / 60;
    hrs = p / 60;
    min = p % 60;
    printf("\n Time in NEWYORK is %ld:%ld:%ld i.e., "
           "%ld hours %ld minutes %ld seconds",
            hrs, min, sec, hrs, min, sec);
  }
}

void china()
{
  // China time is 2:30 hrs ahead of India
  // 2:30hrs = 9000 seconds
  r = t + 9000; 
  if (r > 86400) 
  {
    q = r - 86400;
    sec = q % 60;
    p = q / 60;
    hrs = p / 60;
    min = p % 60;
    printf("\n Time in CHINA is %ld:%ld:%ld i.e., %ld "
           "hours %ld minutes %ld seconds",
            hrs, min, sec, hrs, min, sec);
  }
  else if (r < 86400 && r > 0) 
  {
    sec = r % 60;
    p = r / 60;
    hrs = p / 60;
    min = p % 60;
    printf("\n Time in CHINA is %ld:%ld:%ld i.e., %ld "
           "hours %ld minutes %ld seconds",
            hrs, min, sec, hrs, min, sec);
  }
  else 
  {
    x = 86400 + r;
    sec = x % 60;
    p = x / 60;
    hrs = p / 60;
    min = p % 60;
    printf("\n Time in CHINA is %ld:%ld:%ld i.e., %ld "
           "hours %ld minutes %ld seconds",
            hrs, min, sec, hrs, min, sec);
  }
}

void japan()
{
  // Japan time is 3:30 hrs ahead of India
  // 3:30hrs = 12600 seconds
  r = t + 12600; 
  if (r > 86400) 
  {
    q = r - 86400;
    sec = q % 60;
    p = q / 60;
    hrs = p / 60;
    min = p % 60;
    printf("\n Time in JAPAN is %ld:%ld:%ld i.e., %ld "
           "hours %ld minutes %ld seconds",
            hrs, min, sec, hrs, min, sec);
  }
  else if (r < 86400 && r > 0) 
  {
    sec = r % 60;
    p = r / 60;
    hrs = p / 60;
    min = p % 60;
    printf("\n Time in JAPAN is %ld:%ld:%ld i.e., %ld "
           "hours %ld minutes %ld seconds",
            hrs, min, sec, hrs, min, sec);
  }
  else 
  {
    x = 86400 + r;
    sec = x % 60;
    p = x / 60;
    hrs = p / 60;
    min = p % 60;
    printf("\n Time in JAPAN is %ld:%ld:%ld i.e., %ld "
           "hours %ld minutes %ld seconds",
            hrs, min, sec, hrs, min, sec);
  }
}

void saudiarabia()
{
  // Saudiarabia time is 2:30 hrs behind of India
  // 2:30hrs = 9000 seconds
  r = t - 9000; 
  if (r > 86400) 
  {
    q = r - 86400;
    sec = q % 60;
    p = q / 60;
    hrs = p / 60;
    min = p % 60;
    printf("\n Time in SAUDIARABIA is %ld:%ld:%ld "
           "i.e., %ld hours %ld minutes %ld seconds",
            hrs, min, sec, hrs, min, sec);
  }
  else if (r < 86400 && r > 0) 
  {
    sec = r % 60;
    p = r / 60;
    hrs = p / 60;
    min = p % 60;
    printf("\n Time in SAUDIARABIA is %ld:%ld:%ld "
           "i.e., %ld hours %ld minutes %ld seconds",
            hrs, min, sec, hrs, min, sec);
  }
  else 
  {
    x = 86400 + r;
    sec = x % 60;
    p = x / 60;
    hrs = p / 60;
    min = p % 60;
    printf("\n Time in SAUDIARABIA is %ld:%ld:%ld "
           "i.e., %ld hours %ld minutes %ld seconds",
            hrs, min, sec, hrs, min, sec);
  }
}