// ´ÞÀÇ Àϼö¸¦ °è»êÇÏ´Â ÇÁ·Î±×·¥
#include <stdio.h>
int main(void)
{
int month, days;
printf("Àϼö¸¦ ¾Ë°í ½ÍÀº ´ÞÀ» ÀÔ·ÂÇϽÿÀ: ");
scanf("%d", &month);
if (month == 2)
days = 28;
else if (month == 4 || month == 6 || month == 9 || month == 11)
days = 30;
else
days = 31;
printf("%d¿ùÀÇ Àϼö´Â %dÀÔ´Ï´Ù.\n", month, days);
return 0;
}