#include <stdio.h>
#include <time.h>

int main()
{
    time_t elaps, timettx, curtime;
    struct tm *elaps_st, time_x;

    time_x.tm_year = 2009-1900;
    time_x.tm_mon = 6;
    time_x.tm_mday = 11;
    time_x.tm_hour = 14;
    time_x.tm_min = 0;
    time_x.tm_sec = 0;
    time_x.tm_isdst = 1;

    time(&curtime);
    printf("Current time:   %s", ctime(&curtime));
    timettx = mktime(&time_x);
    printf("Time X:         %s", ctime(&timettx));
    elaps = timettx - curtime;
    printf("Diff time:      %s", ctime(&elaps));
    elaps_st = localtime(&elaps);

    printf("To time X remain %d days %d hours %d min %d sec\n", elaps_st->tm_mday, elaps_st->tm_hour, elaps_st->tm_min, elaps_st->tm_sec);
}

d = elaps / (60*60*24);
h = (elaps - (d * 60*60*24)) / (3600);
printf("%d days %d hrs left\n", d, h);