#include<stdio.h>
#include<stdlib.h>
#include<string.h>
char*month_str[]={"January","February","March","April","May","June","July","August","September","Octoer","November","December"};
char* week[]={"星期日","星期一","星期二","星期三","星期四","星期五","星期六"};
char* festivals[] = {"1,1","2,14","3,8","3,12","3,15","4,1","4,5","5,1","5,4", "6,1","7,1","8,1","9,10","10,1","12,25"};
int IsLeapYear(int year) /*判断是否是闰年*/
   {
    if((year%4==0&&year%100!=0)|| (year%400==0)) //这⾥是判断是否是闰年的
        return 1; //如果是闰年就返回值1
    else
    return 0;//不是的话返回0
   }
int month_day(int year,int month) //这个函数⽤来判断 这年的月分有多少天的
    {
        int mon_day[]={31,28,31,30,31,30,31,31,30,31,30,31};
        if(IsLeapYear(year)&&month==2) /*判断是否是闰年，如果是闰年⽽且这个⽉是2⽉那这个月有29天*/
            return 29;
        else
            return(mon_day[month-1]); }
int DaySearch(int year,int month,int day) /*这个函数是计算输入的日期对应的星期*/
    {
        int c=0;
        float s;
        int m; for(m=1;m<month;m++)
            c=c+month_day(year,m); //这是计算输入的月分的累计天数
            c=c+day; //该⽇期在这⼀年中是第几天
            s=year-1+(int)(year-1)/4+(int )(year-1)/100+(int)(year-1)/400-40+c; /*这是计算⽇期对应的星期公式，这是网上查的*/
        return ((int)s%7); //与上语句同属计算日期对应的星期
    }
    int YearMonth(int year,int month)
   {    int temp;int j;
        printf("\n\n%s(%d)\n",month_str[month-1],month); //输出⽉分名称
        printf("SA MO TU WE TH FR SA \n");
        temp=DaySearch(year,month,1);/*这个函数是计算输⼊的日期对应的星期*/
        for(j=1;j<=month_day(year,month)+temp;j++)
        {
            if(j-temp<=0) printf("   ");
            else if(j-temp<10)
                printf("%2d ",j-temp);
 else
                printf("%2d ",j-temp);
            if(j%7==0) printf("\n");
        }
        return 0;
   }
    int PrintAllYear(int year)/*这个函数是⽤用来输出全年年的 ⽇日历*/
    {
        int temp;
        int i,j;
        printf("---------------The Calander Of %d---------------\n",year);
        for(i=1;i<=12;i++)
        {
               printf("\n\n%s(%d)\n",month_str[i-1],i); //输出月分名称
               printf("SA MO TU WE TH FR SA \n");
               temp=DaySearch(year,i,1);/*这个函数是计算输⼊的日期对应的星期*/
               for(j=1;j<=month_day(year,i)+temp;j++)
               {
                   if(j-temp<=0)
                       printf("   ");
           else if(j-temp<10)
                       printf("%2d ",j-temp);
                   else
                       printf("%2d ",j-temp);
                   if(j%7==0)
                       printf("\n");
               }
        }
               return 0;
        
    }
    int testDate1(int month,int day)
    {
        char Date[] = {"month,day"};
        //sprintf(Date, "%d,%d", month, day);
        for (int i = 0; i <15; i++)
        if (strcmp(Date, festivals[i])!=0)
        { printf("是");
          break;
        }
        return 0;
    }
int main()
{
    int option,da;
    char ch;
    int year,month,day;
    printf("---------------欢迎使用旺氏日历---------------\n");
    while(1)
    {
     printf("\n请输入你想查询的内容:"); //⽤来提示选择执行功能
     printf("\n1,星期(具体年月日的星期)"); //⽤来计算这一天是星期⼏
     printf("\n2,月历"); //输出月历
     printf("\n3,年历"); //输出全年的日历
     printf("\n4,节日查询");//输出该天是否为节日
     printf("\n5,退出\n");//选择退出程序
     scanf("%d",&option);
    switch(option) //⽤用来选择执⾏
    {
    case 1:/*当为1时，进⾏相应运算*/
 while(1)
     {
        printf("\n请输入年月日(例如2019,10,1):"); //提示输入
        scanf("%d,%d,%d",&year,&month,&day); //读⼊数据
        da=DaySearch(year,month,day); //调⽤DaySearch()函数来计算是星期几
        printf("\n您查询的%d,%d,%d是%s",year,month,day,week[da]);
        printf("\n您还想继续查询吗?(如果继续，请直接输入，否则请输入N，返回主菜单)");
        fflush(stdin); //刷新输⼊入缓冲区
        scanf("%c",&ch);
        if(ch=='N'||ch=='n')
        break;
      }
     break;
    case 2: /*当为2时，进行相应运算*/
      while(1)
    {
       printf("\n请输入你想查询的年月(例如2019,1)");
       scanf("%d,%d",&year,&month);
       YearMonth(year,month);
       printf("\n您还想继续查询吗?(如果继续，请直接输入，否则请输入N，返回主菜单)");
 fflush(stdin);
       scanf("%c",&ch);
       if(ch=='N'||ch=='n')
       break;
     }
       break;
    case 3: /*当为3时运⾏行行相应的运算*/
      while(1)
    {
        printf("\n请输入您想查询的年份(仅限于1940-2040)");
        scanf("%d",&year);
        PrintAllYear(year);
        printf("\n您还想继续查询吗？(如果继续，请直接输入，否则请输入N，返回主菜单)?");
        fflush(stdin);
        scanf("%c",&ch);
        if(ch=='N'||ch=='n')
            break;
    }
        break;
    case 4:/*当为4时运行相应的运算*/
  while(1)
    {
        printf("\n请输入你想查询的日期(例如11,1)");
        scanf("%d,%d",&month,&day);
        testDate1(month,day);//是节⽇则输出是，不是则无输出
        printf("\n您还想继续查询吗(如果继续，请直接输⼊，否则请输入N，返回主菜单)?");
        fflush(stdin);
        scanf("%c",&ch);
        if(ch=='N'||ch=='n')
        break;
    }
    break;
    case 5:/*当为4时运行相应的运算*/
      while(1)
    {
        printf("您确认吗?(如果继续，请直接输入，否则请输入Y，退出该程序)");
        fflush(stdin);
        scanf("%c",&ch);
        if(ch=='Y'||ch=='y')
        {
          printf ("\n感谢您的使用!^_^");
            exit(1);
        }
        break;
        default:
        printf("\nError:Sorry,there is no this service now!\n");
        break;
    }
    }
    }
        return 0;
                   
}