#include<stdio.h>
//台历（没有实现双列输出 和 1582年的少十天  
void k( int x,int year,int month)
  { int i,day=0,j; 
   for(i=0;i<year;i++)
	   if(i%4==0&&i%100!=0||i%400==0)
		   day=day+366;
	   else
		   day=day+365;
		   
	   for(i=1;i<month;i++)
	   {   switch(i)
	   {
	               case 1: case 3: case 5: case 7: case 8: case 10: case 12:
					   day=day+31;
					   break;
				   case 4: case 6: case 9: case 11:
					   day=day+30;
					   break;
				   case 2:
				       if(year%4==0&&year%100!=0||year%400==0)
			      		 day=day+29;
			        	 else
			       		 day=day+28;
		        		 break;
						 }}
	     j=day%7+1;
		 if(j!=7)
		 {
	        for(i=1;i<=j;i++)
	     	   printf("\t");
		 }
	      for(i=1;i<=x;i++)
		  {
	          if(i==(7-j)||(i-(7-j))%7==0)
			  {  
                 printf("%d\n\n",i);
	             continue;}
	       printf("%d\t",i);
 }	
		  printf("\n\n");
}
  void weed( int month,int year)
  { int  i;
    char a[7][19]={"日","一","二","三","四","五","六"};    	
	printf("--------------------%d年 %d月--------------------\n\n",year,month); 
    for(i=0;i<7;i++)
 	  printf("%s\t",a[i]);
      printf("\n\n");
  }
int main()
{
	int num,year,month,day;
	int a,week;
	while(1)
{
	printf("      菜单      \n1.查询年份是否为闰年\n2.查询星期几\n3.展示日历\n0.退出\n");
	printf("输入您想应用的功能对应的数字");
	scanf("%d",&num);
	switch(num)
	{
		case 0:
			printf("感谢使用");
			return 0;
		case 1:
			printf("输入年份"); 
	        scanf("%d",&year); 
	if((year%4==0)&&(year%100!=0)||(year%400==0))
		a=0;
	else
		a=1;
			switch(a)
			{
				case 0:printf("该年为闰年\n");break;
				case 1:printf("该年不是闰年\n");break;
			}break;
		case 2:
			printf("输入年份"); 
	        scanf("%d",&year);
	        printf("输入月份");
	        scanf("%d",&month);
	        printf("请输入日期");
	        scanf("%d",&day); 
	        if(month==1||month==2)
			{	month=month+=12;
		        year--;
		        week=(day+2*month+3*(month+1)/5+year+year/4-year/100+year/400)%7; 
		    }
	
	         else if(month==3||month==4||month==5||month==6||month==7||month==8||month==9||month==10||month==11||month==12)
	            week=(day+2*month+3*(month+1)/5+year+year/4-year/100+year/400)%7;
			switch(week)
			{
				case 0:printf("星期一\n");break;
				case 1:printf("星期二\n");break;
				case 2:printf("星期三\n");break;
				case 3:printf("星期四\n");break;
				case 4:printf("星期五\n");break;
				case 5:printf("星期六\n");break;
				case 6:printf("星期天\n");break; 
			}
			break; 
		case 3:
		printf("1.只写了单列排列\n2.只写了单列排列\n");
		 int year,month=0;
         int x;
         printf("请输入要查询的年份：");
         scanf("%d",&year);
        if(year==1582&&month==10&&day>=5&&day<=14) 
       {
        printf("\n");
			   while(month++<=12)
			   { 
				   switch(month)
				   {
				   case 1: case 3: case 5: case 7: case 8: case 10: case 12:
					   x=31;
					  weed(month,year);
					  k(x,year,month);
					  break;
				   case 4: case 6: case 9: case 11:
					   x=30;
                      weed(month,year);
					  k(x,year,month);
					  break;
				   case 2:
					 if(year%4==0&&year%100!=0||year%400==0)
						 x=29;
					 else
						 x=28;
                      weed(month,year);
					  k(x,year,month);
		            }
		    }
		}
        else
         printf("\n");
			   while(month++<=12)
			   { 
				   switch(month)
				   {
				   case 1: case 3: case 5: case 7: case 8: case 10: case 12:
					   x=31;
					  weed(month,year);
					  k(x,year,month);
				
					  break;
				   case 4: case 6: case 9: case 11:
					   x=30;
                      weed(month,year);
					  k(x,year,month);
					  break;
				   case 2:
					 if(year%4==0&&year%100!=0||year%400==0)
						 x=29;
					 else
						 x=28;
                      weed(month,year);
					  k(x,year,month);
					  break;
				   }
			   }
	     
			 
			 
	
		   
    }
        
}
}