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#include <stdio.h>
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#include<string.h>
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#include<time.h>
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int rulueri(int,int,int);//计算输入数据的儒略日，用以计算据你今天的日期
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void print(int,int);//日历的输出
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int weekday(int ,int ,int );//计算该日为星期几
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int all_day(int ,int );//计算该月有多少天
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void gongneng(int );//执行相应功能
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void jieri(int,int);//判断是否为公历节日
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void xianshi1();//显示功能
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void xianshi2();//显示功能
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void xianshi3();//显示功能
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int panduan();//判断是与否
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int xuanxiang();//记录选项
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int timeyear;
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int timemonth;
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int timeday;
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int rulueri(int year,int month,int day)//计算输入数据儒略日
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{
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int b=0;
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double dd;
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if(month<=2)
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{
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month+=12;//对月份进行修正
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year-=1;//对年进行修正
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}
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b=year/100;
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b=2-b+year/400;
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dd=day+0.5000115740;//本日12:00过后才是儒略日的开始（过一秒钟）
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return (365.25*(year+4716)+0.01)+(30.60001*(month+1))+dd+b-1524.5;//计算儒略日的公式，结果返回儒略日值
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}
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void print(int week, int day)//输出指定的日历
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{
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int i=0,j=1;//i:循环变量 j:修正星期数为5,6是的循环范围
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int date=1;//自加以输出日
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int flag=week;//用以日历第一行空格
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printf("日 一 二 三 四 五 六\n");
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if(week>=5)
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j+=1;
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for (i=0; i<(day+week)/7+j; i++)
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{
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int j=0;
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int k=0;
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for (j=0; j<week; j++)
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{
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if (flag!=0)
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{
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printf(" ");
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}
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flag--;
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}
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for (k=0;k<7-week;k++)
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{
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printf("%2d ",date);
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date++;
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if (date > day)
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{ printf("\n");
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break;
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}
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}
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if (date > day)
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{ printf("\n");
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break;
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} week = 0;
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printf("\n");
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}
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}
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int weekday(int year,int month,int day)//输出该日为星期几
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{
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int m,d,y,c,w;//y:年数，m:月数，d:某月内的日数，c:世纪数-1，w:星期
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m = month;
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d = day;
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if(month <= 2) /*对小于2的月份进行修正*/
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{
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year--;
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m = month + 12;
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}
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y = year % 100;
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c = year / 100;
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w = (y + y / 4 + c / 4 - 2 * c + (13 * (m + 1) / 5) + d - 1) % 7;//蔡勒公式，用以计算星期几
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if(w < 0) /*修正计算结果是负数的情况*/
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w += 7;
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return w;
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}
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int all_day(int y ,int m)//计算该月的日数
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{
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int flag = 0;//存放是否为闰年的数
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int day = 30;
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if (((y % 4 == 0) && (y % 100 == 0)) || (y % 400 == 0))
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{
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flag = 1;
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}
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if ((m == 1) || (m == 3) || (m == 5) || (m == 7)
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|| (m == 8) || (m == 10) || (m == 12))
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{
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day = 31;
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}
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else if ((m == 2) && (flag == 1))
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{
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day = 29;
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}
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else if ((m == 2) && (flag == 0))
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{
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day = 28;
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}
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else
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day = 30;
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return day;
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}
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void gongneng(int num)//提供选择，并输出相应数据
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{
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int year = 0;
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int month = 0;
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int week = 0;//用来保存输入月份第一天是周几
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int dday = 0;//用来保存每月共有多少天
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int day;
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switch(num)
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{
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case 2:
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printf("请输入年，月：\n");
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scanf("%d%d", &year, &month);
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week = weekday(year, month,1);//计算出某月第一天是星期几
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dday = all_day(year, month);//用来计算每月共有多少天
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printf("%d月************************\n",month);
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print(week, dday);
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break;
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case 1:
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printf("请输入年份：\n");
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scanf("%d",&year);
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for(month=1;month<=12;month++)
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{ printf("%d月********************\n",month);
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week = weekday(year, month,1);//计算出这个月第一天是星期几
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dday = all_day(year, month);//用来计算每月共有多少天
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print(week, dday);
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}
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break;
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case 3:
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printf("请输入年，月，日:\n");
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scanf("%d%d%d",&year,&month,&day);
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if(rulueri(year,month,day)<=rulueri(timeyears(),timemonths(),timedays()))//判断所求日期是否在今天之前
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printf("距今天%d天\n",rulueri(timeyears(),timemonths(),timedays())-rulueri(year,month,day));
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else
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printf("距今天%d天\n",rulueri(year,month,day)-rulueri(timeyears(),timemonths(),timedays()));
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if(weekday(year,month,day)!=0)//修正星期天0为7
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printf("该日是星期%d\n",weekday(year,month,day));
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else
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printf("该日是星期7\n");
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jieri(month,day);
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break;
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}
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}
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void jieri(int month,int day)//判断并输出公历节日
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{
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if(month==1&&day==1)
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printf("%d月%d日是元旦节\n",month,day);
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else if(month==3&&day==8)
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printf("%d月%d日是妇女节\n",month,day);
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else if(month==3&&day==12)
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printf("%d月%d日是植树节\n",month,day);
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else if(month==5&&day==1)
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printf("%d月%d日是劳动节\n",month,day);
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else if(month==5&&day==4)
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printf("%d月%d日是青年节\n",month,day);
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else if(month==6&&day==1)
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printf("%d月%d日是儿童节\n",month,day);
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else if(month==7&&day==1)
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printf("%d月%d日是建党节\n",month,day);
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else if(month==8&&day==1)
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printf("%d月%d日是建军节\n",month,day);
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else if(month==9&&day==10)
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printf("%d月%d日是教师节\n",month,day);
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else if(month==10&&day==1)
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printf("%d月%d日是国庆节\n",month,day);
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else
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printf("该日不是公历节日！\n");
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}
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void xianshi1()//显示功能
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{
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printf("\t\t年历显示系统\t\t\n");
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printf("请选择下列选项：\n");
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printf("1.输入年份输出该年的日历\n2.输入年月输出该月的日历\n3.输入年月日输出据今天还有多少天，星期几，是否公历节日\n");
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printf("请输入：");
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}
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void xianshi2()//显示功能
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{
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printf("无法识别！\n");
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}
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void xianshi3()//显示功能
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{
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printf("是否继续（继续：Y，结束：N）：\n");
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}
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int xuanxiang()//记录选项
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{
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int num;//用来保存选择选项
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scanf("%d",&num);
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return num;
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}
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int panduan()//判断是与否
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{
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char suz[100],y[]="y",n[]="n",Y[]="Y",N[]="N";
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scanf("%s",suz);
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if(strcmp(suz,y)==0||strcmp(suz,Y)==0)
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return 2;
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else if(strcmp(suz,n)==0||strcmp(suz,N)==0)
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return 1;
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else
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return 0;
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}
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int timeyears()
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{
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int year;
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struct tm *local;
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time_t t;
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t=time(NULL);
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local=localtime(&t);
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year=local->tm_year+1900;
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return year;
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}
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int timemonths()
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{
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int month;
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struct tm *local;
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time_t t;
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t=time(NULL);
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local=localtime(&t);
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month=local->tm_mon+1;
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return month;
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}
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int timedays()
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{
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int day;
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struct tm *local;
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time_t t;
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t=time(NULL);
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local=localtime(&t);
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day=local->tm_mday;
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return day;
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}
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int main()
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{
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int x=-1;//储存判断函数返回值
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while(1)
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{ xianshi1();
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gongneng(xuanxiang());
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fflush(stdin);
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xianshi3();
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while(1)
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{
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x=panduan();
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fflush(stdin);
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if(x==0)
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{ fflush(stdin);
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xianshi2();
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xianshi3();
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continue;
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}
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else if(x!=0)
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break;
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}
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if(x==1)
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break;
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else if(x==2)
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continue;
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}
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return 0;
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} |
