根据年和月获取当月天数的函数

int getDaysByYearAndMonth(int year, int month)
   {
	   int result;
	   if (2==month)
	   {
		   if(year%4==0&&year%100!=0||year%400==0){
				result=29;
		   }else{
				result=28;
		   }
	   }
	   else if (month==4||month==6||month==9||month==11)
	   {
		   result=30;
	   }
	   else{
		   result=31;
	   }
	   return result;
   }