【NO.2】set day of year from month & day

#include "stdafx.h"
int day_of_year(int year, int month, int day);
int _tmain(int argc, _TCHAR* argv[])
{
int year = 0, month = 0, day = 0;

printf("please input year month day(yyyy month day)\n");
scanf_s("%4d %2d %2d", &year, &month, &day);

int DayOfYear = day_of_year(year, month, day);
printf("%4d-%2d-%2d is the %d days in this year", year, month, day, DayOfYear);
getchar();
}

/*day_of_year: set day of year from month & day*/
static char daytab[2][13]=
{
{0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31},
{0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}
};

int day_of_year(int year, int month, int day)
{
int i, leap;
if ((year % 4) == 0 && (year % 100 != 0) || (year % 400 == 0))
{
leap = 1;
}
else
{
leap = 0;
}
for(i=1; i < month; i++)
{
day+= daytab[leap][i];
}
set day of year from month & day
return day;
}