1949501_wa.c

北大大牛代码 1240道题的原代码 超级权威

# include <stdio.h>

int is_leap(long year)
{
	return ((year%4==0&&year%100!=0)||year%400==0);
}

static int monthdays[] = {0,31,28,31,30,31,30,31,31,30,31,30,31};
static char days[][10] = {"Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"};
int main()
{
	static int t = 6;
	int leap, month;
	long num, tmp, year;

	while(scanf("%ld",&num)==1&&num!=-1)
	{
		tmp = num;
		for(year = 2000; ;year++)
		{
			leap = is_leap(year);
			if(num > 365 + leap)
				num -= 365 + leap;
			else
				break;
		}
		if(leap)
			monthdays[2] = 29;
		else
			monthdays[2] = 28;
		for(month = 1; month <= 12; month++)
		{
			if(num >= monthdays[month])
				num -= monthdays[month];
			else
				break;
		}
		printf("%ld-%02d-%02d %s\n",year,month,num+1,days[(tmp%7+t)%7]);
	}
	return 1;
}