include<stdio.h>

int myweek(int year,int mouth)//计算输入的年月的第一天是周几
{
int alldays=0;
int mouthArr[]={0,31,0,31,30,31,30,31,31,30,31,30,31};
if(year<1990||mouth>12||mouth<1){
printf("您输入的信息有误，请参看相关文献输入");
}else{
int i;
for(i=1990;i<year;i++){
if((i%4==0&&i%100!=0)||(i%400==0)){
alldays+=366;
}else{
alldays+=365;
}
}

         if((year%4==0&&year%100!=0)||(year%400==0)){
              mouthArr[2]=29;
         }else{
              mouthArr[2]=28;
         }

         for(i=0;i<mouth;i++){
              alldays+=mouthArr[i];
         }

         int value=alldays%7;
         int week=(value+1)%7;
        return week;
}

}
void calender(int year,int mouth,int week)//打印万年历
{
int mouthArr[]={0,31,0,31,30,31,30,31,31,30,31,30,31};

if((year%4==0&&year%100!=0)||(year%400==0)){
        mouthArr[2]=29;
}else{
        mouthArr[2]=28;
}
 printf("日\t一\t二\t三\t四\t五\t六\n");
 int count=0;
 int i;
 for(i=0;i<week;i++){
         printf(" \t");
         count++;
 }

 for(i=1;i<=mouthArr[mouth];i++){
       count++;
         printf("%d\t",i);
     if(count%7==0){
               printf("\n");
          }
  }

  if(count%7!=0){
          printf("\n");
  }

}

int main()
{
int year,mouth;
printf("请输入要查询的年份：\n");
scanf("%d",&year);
printf("请输入要查询的年份：\n");
scanf("%d",&mouth);

int week=myweek(year,mouth);//计算输入的年月的第一天是周几
printf("%d年%d月的第一天是星期%d\n",year,mouth,week);
calender(year,mouth,week);//根据输入的年月和周几，打印万年历

return 0;

}