#include <stdio.h> 
#include <stdlib.h> 
int yearr(int year) 
{ 
if (year%4==0&&year%100||year%400==0)
return 1;
else
return 0; 
} 
int printfweek() 
{ 
printf("%s\t%s\t%s\t%s\t%s\t%s\t%s\t\n","周日","周一","周二","周三","周四","周五","周六"); 
} 
int tian(int month,int year) 
{ 
int day; 
switch (month) 
{ 
case 1: 
case 3: 
case 5: 
case 7: 
case 8: 
case 10: 
case 12:day=31;break; 
case 4: 
case 6: 
case 9: 
case 11:day=30;break; 
case 2:{
              if(year%400==0||(year%4==0&&year%100!=0))
			   day=29;
		     	else
			   day=28;
		    	}
				break; 

} 
return day; 
} 

int prifirst(int month,int year) 
{ 
int b; 
if (month<3) 
{ 
month=month+12; 
year--; 
} 
b=(1+2*month+3*(month+1)/5+year+year/4-year/100+year/400)%7; 
return b; 
} 
int prtmonth(int month) 
{ 
switch (month) 
{ 
case 1:printf("%26s\n","一月\n");break; 
case 2:printf("%26s\n","二月\n");break; 
case 3:printf("%26s\n","三月\n");break;
case 4:printf("%26s\n","四月\n");break; 
case 5:printf("%26s\n","五月\n");break;
case 6:printf("%26s\n","六月\n");break;
case 7:printf("%26s\n","七月\n");break;
case 8:printf("%26s\n","八月\n");break;
case 9:printf("%26s\n","九月\n");break;
case 10:printf("%26s\n","十月\n");break; 
case 11:printf("%26s\n","十一月\n");break; 
case 12:printf("%26s\n","十二月\n");break;
} 
}
int main() 
{ int a;
  int year,month,i,c,week; 
  printf("1:查询某一年日历\n2:查询某年某月有几天\n3:查询某日是一年中的第几天\n");
  printf("请输入选项：\n") ;
scanf("%d",&a);
switch(a)
{
  case 1:printf("年份\n:"); 
      scanf("%d",&year); 
      for (month=1; month<=12; month++) { 
      c=1; 
      prtmonth(month); 
      printfweek(); 
      week=prifirst(month,year);
      if (week!=6) 
      for (i=0; i<=week; i++) { 
      printf("\t"); 
      c++; 
} 
 for (i=1; i<=tian(month,year); i++,c++) 
 { 
 printf("%d\t",i); 
 if (c%7==0) 
 { 
 printf("\n");
 } 
} 
printf("\n"); 
} 
return 0; 
break;
case 2:int day;
 printf("输入年月：\n");
         scanf("%d%d",&year,&month);
		 day=tian(month,year);
	       printf("%d年%d月有%d天",year,month,day);
	       return 0; 
	        break;
case 3:int flag=0,le,sum;
	         printf("输入年月日：\n");
 	        scanf("%d%d%d",&year,&month,&day);
	        switch(month)
	       { case 1:sum=0;break;
	         case 2:sum=31;break;
	         case 3:sum=59;break;
	         case 4:sum=90;break;
	         case 5:sum=120;break;
             case 6:sum=151;break;
	         case 7:sum=181;break;
             case 8:sum=212;break;
	         case 9:sum=243;break;
	         case 10:sum=273;break;
	         case 11:sum=304;break;
	         case 12:sum=334;break;
	         default:flag=1;
	       }
             if(flag==0)
	         {
			 sum=sum+day;
	          if(year%400==0||(year%4==0&&year%100!=0))
            	le=1;
				else
	            le=0;
	           if(le=1&&month>2)
	          sum++;
	               printf("%d月%d日是%d年的第%d天",month,day,year,sum);
				   return 0;
	          } 
			  break;
}
return 0; 

}