将年月日成一年中第几天

#include<stdio.h>
void main()
{
	int year,month,day,i,leap=0;
	static int day_tab[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}
	};
	printf("输入格式样例：2003 1 8\n输入：“）；
	scanf("%d%d%d",&year,&month,&day);

	leap=year%4==0&&year%100!=0||year%400==0;
	for(i=0;i<month;++i)
		day+=day_tab[leap][i];
	printf(""%d\n",day);
}