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#include <stdio.h>
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#include <stdlib.h>
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#include <math.h>
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int monthdays[12] = {31,28,31,30,31,30,31,31,30,31,30,31} ;
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char yearr(int year)
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{
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if (year%4==0&&year%100||year%400==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 midmonthday(int m1 , int m2, int y)
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{
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int i ;
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int s ;
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s = 0 ;
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for(i = m1 + 1 ; i < m2 ; i++)
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{
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s =s+ monthdays[i-1] ;
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if(i == 2)
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{
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if(yearr(y))
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{
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s++ ;
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}
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}
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}
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return s ;
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}
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int SameYearDays(int y1 , int m1 , int d1 , int y2 , int m2 , int d2)
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{
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int Days ;
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if(m1 == m2)
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{
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Days =abs(d2 - d1) ;
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}
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else
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{
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Days = abs(monthdays[m1 - 1] - d1) ;
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if(m1 == 2)
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{
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if(yearr(y1))
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{
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Days++ ;
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}
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}
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if((m1 + 1) != m2)
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{
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Days += midmonthday(m1 , m2, y1);
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}
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Days += d2 ;
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}
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return Days;
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}
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int GetMidYearDays(int y1,int y2)
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{
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int days=0;
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int i=0;
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for (i=y1+1;i<y2;i++)
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{
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if (yearr(i-1))
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{
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days+=366;
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}
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else
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days+=365;
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}
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return days;
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}
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int distanceYearDays(int y1 , int m1 , int d1 , int y2 , int m2 , int d2)
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{
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int days;
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if (y1==y2)
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{
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days=SameYearDays( y1 ,m1 ,d1 , y2 , m2 ,d2);
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}
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else
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{
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days=monthdays[m1+1]-d1;
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if((y1+1) != y2)
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{
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days+=GetMidYearDays(y1,y2);
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}
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days+=midmonthday(m1-1,13,y1);
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if(m2==1)
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{
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days+=d2;
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}
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else
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{
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days+=midmonthday(1,m2,y2);
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days+=d2;
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}
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}
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return days;
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}
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int printfweek()
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{
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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");
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} int GetWeek(int year,int month)
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{
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int m[12] = {31,28,31,30,31,30,31,31,30,31,30,31};
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int day=0,week,i;
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switch (month)
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{
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case 1:
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day = 1;
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break;
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case 2:
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day = m[0] + 1;
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break;
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case 3:
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case 4:
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case 5:
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case 6:
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case 7:
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case 8:
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case 9:
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case 10:
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case 11:
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case 12:
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{if (yearr(year) == true)
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m[1] = 29;
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for (i=0;i<month-1;i++)
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{
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day = day + m[i];
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}
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}
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day = day + 1;
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break;
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}
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week = ((year-1) + (year-1)/4 - (year-1)/100 + (year-1)/400 + day) % 7;
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return week;
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}
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int tian(int month,int year)
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{
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int day;
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switch (month)
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{
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case 1:
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case 3:
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case 5:
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case 7:
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case 8:
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case 10:
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case 12:day=31;break;
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case 4:
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case 6:
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case 9:
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case 11:day=30;break;
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case 2:{
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if(year%400==0||(year%4==0&&year%100!=0))
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day=29;
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else
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day=28;
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}
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break;
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}
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return day;
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}
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int prifirst(int month,int year)
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{
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int b;
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if (month<3)
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{
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month=month+12;
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year--;
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}
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b=(1+2*month+3*(month+1)/5+year+year/4-year/100+year/400)%7;
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return b;
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}
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int prtmonth(int month)
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{
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switch (month)
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{
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case 1:printf("%26s\n","一月\n");break;
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case 2:printf("%26s\n","二月\n");break;
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case 3:printf("%26s\n","三月\n");break;
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case 4:printf("%26s\n","四月\n");break;
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case 5:printf("%26s\n","五月\n");break;
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case 6:printf("%26s\n","六月\n");break;
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case 7:printf("%26s\n","七月\n");break;
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case 8:printf("%26s\n","八月\n");break;
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case 9:printf("%26s\n","九月\n");break;
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case 10:printf("%26s\n","十月\n");break;
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case 11:printf("%26s\n","十一月\n");break;
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case 12:printf("%26s\n","十二月\n");break;
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}
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}
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int hello()
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{ int a;
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int year,month,i,c,week;
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printf("--------------------\n");
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printf(" 1:查询某一年日历\n");
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printf(" 2:查询某年某月有几天\n");
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printf(" 3:查询两天之间相差多少天\n");
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printf(" 4查询某天是星期几\n") ;
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printf(" 5判断是否为节假日\n");
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printf(" 6输出某年月日历\n");
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printf("请输入选项：\n") ;
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scanf("%d",&a);
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switch(a)
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{
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case 1:printf("年份\n:");
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scanf("%d",&year);
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for (month=1; month<=12; month++) {
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c=1;
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prtmonth(month);
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printfweek();
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week=prifirst(month,year);
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if (week!=6)
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for (i=0; i<=week; i++) {
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printf("\t");
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c++;
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}
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for (i=1; i<=tian(month,year); i++,c++)
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{
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printf("%d\t",i);
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if (c%7==0)
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{
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printf("\n");
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}
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}
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printf("\n");
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}
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return 0;
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break;
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case 2:int day;
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printf("输入年月：\n");
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scanf("%d%d",&year,&month);
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day=tian(month,year);
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printf("%d年%d月有%d天",year,month,day);
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return 0;
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break;
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case 3:int Year1 ,Month1 ,Day1 ,Year2 ,Month2 ,Day2;
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int Days ;
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printf("输入第一个日期(年 月 日)：\n");
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scanf("%d%d%d",&Year1,&Month1,&Day1);
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printf("输入第二个日期(年 月 日)：\n");
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scanf("%d%d%d",&Year2,&Month2,&Day2);
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Days = distanceYearDays(Year1, Month1,Day1,Year2,Month2,Day2);
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printf("两个日期相差的天数为：%d\n" , Days);
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break;
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case 4: int y,m,d,c,w;
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printf ("输入年 月 日：");
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scanf ("%d %d %d", &y, &m, &d);
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if (m==1||m==2)
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{
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y--;
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m+=12;
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}
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c = y / 100;
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y = y - c * 100;
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w = (c/4)-2*c+(y+y/4)+(13*(m+1)/5)+d-1;
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while(w<0)
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w += 7;
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w %= 7;
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if (w==0)
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printf ("星期日");
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else printf ("星期%d\n", w);
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return 0;
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break;
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printf("\n");
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case 5:
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printf("请输入日期:\n");
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scanf("%d%d%d",&year,&month,&day);
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switch(month)
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{
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case 1:if(day==1)
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printf("元旦\n");
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break;
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case 4:if(day==5)
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printf("清明\n");
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break;
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case 5:if(day==1)
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printf("劳动节\n");
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break;
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case 6:if(day==1)
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printf("儿童节\n");
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break;
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case 7:if(day==1)
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printf("建党节\n");
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break;
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case 8:if(day==1)
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printf("建军节\n");
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break;
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case 9:if(day==10)
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printf("教师节\n");
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break;
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case 10:if(day==1)
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printf("国庆节\n");
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break;
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default:printf("error");
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}printf("\n");
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break;
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case 6:
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printf("输入年月：");
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scanf("%d%d",&y,&m);
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printf(" %d年%d月\n",y,m);
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printf(" 一 二 三 四 五 六 日\n");
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week = GetWeek(y,m);
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if(week == 0)
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week = 7;
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for (i = 1;i < week; i++)
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{
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printf(" ");
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}
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int month[12] = {31,28,31,30,31,30,31,31,30,31,30,31};
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if (yearr(y) == 1)
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month[1] = 29;
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for(i=1;i<=month[m-1];i++)
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{
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printf("%3d",i);
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if((i+week-1) % 7 == 0)
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printf("\n");
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}
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printf("\n");
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}
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} int main()
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{
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int x;
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while (1)
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{
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printf("-------------操作选项-----------\n");
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printf(" 1:返回菜单 \n");
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printf(" 2:退出程序 \n");
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printf(" 3:执行操作 \n");
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printf("\t" );
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printf("选择要执行的操作: ");
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scanf("%d",&x);
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printf("\n");
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if(x==2)
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break;
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switch(x)
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{
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case 1: break;
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case 3: hello();break;
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default:
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printf("错误输出\n");
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break;
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}
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}
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return 0;
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}
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