#include<stdio.h>
#include<stdlib.h>
int fangbao() 
{
	int i;
	char x;
	printf("1.查询日期所对应的星期\n2.查询该年份日历并竖向输出\n3.查询该年份日历并以2*6格式输出\n4.查询该年是否为闰年\n5.退出程序\n");
	scanf(" %c",&x);
	if(x=='1')
	x=1;
	else if(x=='2')
	x=2;
	else if(x=='3')
	x=3;
	else if(x=='4')
	x=4;
	else if(x='5')
	x=5;	
	else
	x=6;
	return x;
}
int runnian(int year,int month) 
{
	int md[]={0,31,28,31,30,31,30,31,31,30,31,30,31}; 
	if((year%4==0&&year%100!=0||year%400==0)&&month==2)
	return 29;
	else
	return md[month];
}
int date(int year,int month,int day)
{
	int c;
	if(month<3)
    {
	    month+=12;
		year--;
	}
	if(year!=1582)
	{
	    int a,b;
	    a=year/100;
	    b=year%100;
	    c=(a/4-2*a+b+b/4+13*(month+1)/5+day-1)%7;
	    if(c<0)
	    c+=7;
	}
	else if(year==1582&&month<=10&&day<=4)
	
	c=(day+1+2*month+3*(month+1)/5+year+year/4+5)%7;
	else if(year==1582&&month>=10&&day>=15) 
	c=(day+1+2*month+3*(month+1)/5+year+year/4-year/100+year/400)%7;
	return c;
}
void yeartb(int year,int month)
{
	int h,j,i;
	h=runnian(1582,month);
	j=date(1582,month,1);
	for(i=0;i<j;i++)
	printf("   ");
	for(i=1;i<=h;i++) 
	{
		if(month==10&&i==5)
		{
		    i+=10;
		}
		printf("%3d",i);
		if(month==10&&i>=5&&(i-10+j)%7==0)
		printf("\n");
		else if(month!=10&&(i+j)%7==0)
		printf("\n");
	}
	printf("\n");
}
void monthtwo(int year, int month) 
{
	int w,k,e;
    w=runnian(year,month);
    k=date(year,month,1);
    for(e=0;e<k;e++) 
    printf("   ");
    for(e=1;e<=w;e++) 
	{
        printf("%3d",e);
        if((e+k)%7==0) 
        printf("\n");
    }
    printf("\n");
}
int main(void)
{
	for(;;)
	{
		int year,month,day,d,e;
		d=fangbao();
		if(d==6) 
		{
			printf("输入错误请从新输入\n\n");
		}
		if(d==5)
		break;
		if(d==1)
		{
			int year,month,day,m;
			printf("请输入日期:\n");
			scanf("%d%d%d",&year,&month,&day);
			if(year<0||month>12||(month==1||month==3||month==5||month==7||month==8||month==10||month==12)&&day>31||(month==4||month==6||month==9||month==11)&&day>30)
			printf("输入错误\n");
			if((year%4==0&&year%100!=0||year%400==0)&&month==2&&day>29||(year%4!=0&&year%100==0||year%400!=0)&&day>28)
			printf("输入错误\n"); 
			if(year==1582) 
			{
				if(month==10&&day>4&&day<15) 
				printf("输入错误\n\n");
			}
			m=date(year,month,day);
			if(m==0)
			printf("该日期为星期日\n");
			else
			printf("该日期为星期%d\n",m);
		}
		if(d==2)
		{
			int f,g;
			printf("请输入年份:\n");
			scanf("%d",&year);
		    if(year<0)
		    printf("输入错误\n");
			printf("%4d年的日历为:\n",year);
			for(month=1;month<=12;month++)
			{
				printf("%d月\n",month);
				printf(" 日 一 二 三 四 五 六\n");
				if(year!=1582)
				monthtwo(year,month);
				else
				yeartb(year,month);
				if(month!=12)
				printf("\n");
			}
		}
		if(d==3)
		{
			printf("请输入年份:\n");
			scanf("%d",&year);
			if(year<0)
			printf("输入错误\n");
			printf("%4d年的日历为:\n",year);
			for(month=1;month<=12;month+=2)
			{
				printf("%d月",month);
				printf("%d月\n",month+1);
				printf(" 日 一 二 三 四 五 六");
				printf(" 日 一 二 三 四 五 六\n");
				monthtwo(year,month);
			}
		}
		if(d==4)
		{
			int year;
			printf("请输入年份:\n");
			scanf("%d",&year);
			if(year<0)
			printf("输入错误\n");
			if(year%4==0&&year%100!=0||year%400==0)
			printf("该年份为闰年\n");
			else
			printf("该年份不是闰年\n"); 
		}
	}
	return 0;
}