پیاده سازی الگوریتم به زبان c :
typedef struct _SHAMSIDATE
{
int iYear;
int iMonth;
int iDay;
}SHAMSIDATE;
SHAMSIDATE MiladiToShamsi(int iMiladiMonth,int iMiladiDay,int iMiladiYear)
{
int shamsiDay, shamsiMonth, shamsiYear;
int dayCount,farvardinDayDiff,deyDayDiff ;
int sumDayMiladiMonth[] = {0,31,59,90,120,151,181,212,243,273,304,334};
int sumDayMiladiMonthLeap[]= {0,31,60,91,121,152,182,213,244,274,305,335};
SHAMSIDATE shamsidate;
farvardinDayDiff=79;
if (MiladiIsLeap(iMiladiYear))
{
dayCount = sumDayMiladiMonthLeap[iMiladiMonth-1] + iMiladiDay;
}
else
{
dayCount = sumDayMiladiMonth[iMiladiMonth-1] + iMiladiDay;
}
if((MiladiIsLeap(iMiladiYear - 1)))
{
deyDayDiff = 11;
}
else
{
deyDayDiff = 10;
}
if (dayCount > farvardinDayDiff)
{
dayCount = dayCount - farvardinDayDiff;
if (dayCount <= 186)
{
switch (dayCount%31)
{
case 0:
shamsiMonth = dayCount / 31;
shamsiDay = 31;
break;
default:
shamsiMonth = (dayCount / 31) + 1;
shamsiDay = (dayCount%31);
break;
}
shamsiYear = iMiladiYear - 621;
}
else
{
dayCount = dayCount - 186;
switch (dayCount%30)
{
case 0:
shamsiMonth = (dayCount / 30) + 6;
shamsiDay = 30;
break;
default:
shamsiMonth = (dayCount / 30) + 7;
shamsiDay = (dayCount%30);
break;
}
shamsiYear = iMiladiYear - 621;
}
}
else
{
dayCount = dayCount + deyDayDiff;
switch (dayCount%30)
{
case 0 :
shamsiMonth = (dayCount / 30) + 9;
shamsiDay = 30;
break;
default:
shamsiMonth = (dayCount / 30) + 10;
shamsiDay = (dayCount%30);
break;
}
shamsiYear = iMiladiYear - 622;
}
shamsidate.iYear = shamsiYear;
shamsidate.iMonth = shamsiMonth;
shamsidate.iDay = shamsiDay;
return shamsidate ;
}
// the function check a miladiyear is leap or not.
BOOL MiladiIsLeap(int miladiYear)
{
if(((miladiYear % 100)!= 0 && (miladiYear % 4) == 0) || ((miladiYear % 100)== 0 && (miladiYear % 400) == 0))
return TRUE;
else
return FALSE;
}