c_kitap

C ve Sistem Programcıları Derneği - C Ders Notları - Necati Ergin
ptr->m_d = d;
ptr->m_m = m;
ptr->m_y = y;
}
/*************************************************************************/
PUBLIC void set_today(Date *ptr)
{
time_t timer = time(NULL);
struct tm *tptr = localtime(&timer);
ptr->m_d = tptr->tm_mday;
ptr->m_m = tptr->tm_mon + 1;
ptr->m_y = tptr->tm_year + 1900;
}
/*************************************************************************/
PUBLIC void set_random(Date *ptr)
{
ptr->m_y = rand() % 50 + 1960;
ptr->m_m = rand() % 12 + 1;
ptr->m_d = rand() % daytabs[isleap(ptr->m_y)][ptr->m_m] + 1;
}
/*************************************************************************/
PUBLIC void display_date(const Date *ptr)
{
static const char *days[] = {"Pazar", "Pazartesi", "Sali", "Carsamba",
"Persembe", "Cuma", "Cumartesi"};
static const char *mons[] = {"", "Ocak", "Subat", "Mart", "Nisan",
"Mayis", "Haziran", "Temmuz", "Agustos", "Eylul","Ekim", "Kasim",
"Aralik"};
printf("%02d %s %4d %s\n", ptr->m_d, mons[ptr->m_m], ptr->m_y,
days[get_weekday(ptr)]);
}
/*************************************************************************/
PUBLIC int date_cmp(const Date *p1, const Date *p2)
{
if (p1->m_y != p2->m_y)
return p1->m_y - p2->m_y;
if (p1->m_m != p2->m_m)
return p1->m_m - p2->m_m;
return p1->m_d - p2->m_d;
}
/*************************************************************************/
PUBLIC void inc_date(Date *p)
{
*p = revdate(totaldays(p) + 1);
}
/*************************************************************************/
PUBLIC void dec_date(Date *p)
{
*p = revdate(totaldays(p) - 1);
}
/*************************************************************************/
PUBLIC Date ndays(const Date *p, int n)
{
return revdate(totaldays(p) + n);
}
/*************************************************************************/
PUBLIC int get_weekday(const Date *ptr)
{
return (totaldays(ptr) + FACTOR) % 7;
}
405