#include<stdio.h>



void printfMenu ()
{
	printf("1.单列输出\n");
    printf("2.双列输出\n"); 
}
//判断是否为闰年 
int isLeapyear(int y)
{
	if(y%4==0&&y%100!=0 || y%400==0)
		return 1;
	else
		return 0;
}
//这个函数用于计算返回该月的天数
int daysInMonth(int y, int m)
{
		switch(m){
		case 1:
		case 3:
		case 5:
		case 7:
		case 8:
		case 10:
			{
				if(y==1582)
				{
					days=21;
				}
			}
		case 12:days = 31;break;
		case 4:
		case 6:
		case 9:
		case 11:days = 30;break;
		case 2:{
				   if(((year%4) == 0) && ((year%100)!=0) || ((year%400) == 0)){
					   days = 29;
				   }else{
					   days = 28;
				   }
			   }
	}
	return days;
}
 
//判断指定日期是星期几
int dayOfWeek(int y, int m, int d)
{
	if(y>1852 && m>10 && d>4)//1582.10.4之后 
	{
		if (m < 3)
		{
			m += 12;
			y--;
		}
	int h = (d + 2 * m + 3 * (m + 1) / 5 + y + y / 4 - y / 100 + y / 400) % 7;
	return h + 1;
	}
	else
	{
		int K,J,h; 
		K=y%100;
		J=y/100;
		switch(m)
		{
		case 1:
			m=3;
			break;
		case 2:
			m=4;
			break;
 		case 3:
 			m=5;
 			break;
 		case 4:
 			m=6;
 			break;
 		case 5:
		 	m=7;
			break; 
 		case 6:
 			m=8;
 			break;
 		case 7:
 			m=9;
 			break;
 		case 8:
 			m=10;
 			break;
 		case 9:
 			m=11;
 			break;
 		case 10:
 			m=12;
 			break;
 		case 11:
 			m=13;
 			break;
 		case 12:
 			m=14;
 			break;
 			
		}
		h=(d+(13*(m+1)/5)+K+K/4+5-J)%7;
		switch(h)
		{
		case 0:
			h=6;
			break;
		case 1:
			h=7;
			break;
		case 2:
			h=1;
			break;
		case 3:
			h=2;
			break;
		case 4:
			h=3;
			break;
		case 5:
			h=4;
			break;
		case 6:
			h=5;
			break;
		}
		return h;
	}
	
}
//显示指定年月的月历
void MonthCalendar(int y, int m, int d)
{
	printf("日\t一\t二\t三\t四\t五\t六")//\t制表符
	int ofday=DaysInMonth(y,m);//获取每个月有多少天
	int first_day = dayOfWeek(y, m, 1);    //获取每月1号是周几
	int ofday = daysInMonth(y, m);        //获取一个月有多少天
	int count = first_day;
	for (int i = 0; i <= ofday; i++)
	{
		//使日期能对齐对应的星期
		if (i == 0)
		{
			for (int j = 0; j < count % 7; j++)
			{
				printf("\t");
			}
		}
		else
		{
			printf("%2d\t", i);
			count++;
		}
 
		//循环打印一周后换行
		if (count % 7 == 0)
		{
			printf("\n");
		}
	}
	printf("\n");
}
 
//这个函数用于显示指定年份 year 的全年日历
void YearCalendar(int y)
{
	int i = 0;
	for (i = 1; i <= 12; i++)
	{
 
		MonthCalendar(y, i, day);
		printf("\n");
	}

}
 
//这个函数用于验证给定的日期是否有效
int isTureDate(int y, int m, int day)

int main(void)
{
	int y,m,d,a;
	
	printf("1.查询对应年份的日历\n");
    printf("2.查询对应日期的星期");
    printf("3.查询对应年份是否为闰年\n");
    printf("4.退出\n");
    
	scanf("%d",&a);
	switch(a) 
	case 1:
		scanf("%d",&y);
		YearCalendar(y);
	case 2:
		scanf("%d %d %d",&y,&m,&d);
		dayOfWeek(y,m,d);
	case 3:
		scanf("%d",&y);
		isLeapyear(y);
	case 4:
	default :
		printf("输入错误请重新输入。")
		
	
}