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#include<stdio.h>
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#include<time.h>
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void menu();
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void year_calendar();
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void year_month_calendar();
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void year_month_day_calendar();
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int main()
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{
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int choice;
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menu();
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printf("请选择你要的日历服务序号：");
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scanf("%d",&choice);
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switch(choice)
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{
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case 1:year_calendar();break;
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case 2:year_month_calendar();break;
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case 3:year_month_day_calendar();break;
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}
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getchar();getchar();getchar();getchar();
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return 0;
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}
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void menu()
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{
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printf("-----------------------------------------------------------------\n");
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printf(" 欢迎来到日历查询系统 \n");
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printf(" 1:查询某年日历 \n");
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printf(" 2:查询某年某月的日历 \n");
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printf(" 3:查询某年月日的日历信息 \n");
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printf("-----------------------------------------------------------------\n");
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}
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void year_calendar()
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{
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int year,day,i,j,k,n,m,q,month_one_weekday[13];//day--到今年一月一日前共多少天； month_one_weekday[13]--每个月1号是星期几；
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int month_day[13]; //month_day[13]---查询当年每月共计多少天。
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printf("请输入你要查询日历的年份：");
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scanf("%d",&year);
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day=0;
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for(i=1;i<=year-1;i++)
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{
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if( year%400==0 || (year%4==0&&year%100!=0) )
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n=366;
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else n=365;
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day=day+n;
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}
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month_day[0]=0;
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for(i=1;i<=12;i++)
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{
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switch(i)
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{
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case 1:case 3:case 5:case 7:
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case 8:case 10:case 12: month_day[i]=31;break;
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case 4:case 6:case 9:case 11: month_day[i]=30;break;
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case 2:if( year%400==0 || (year%4==0&&year%100!=0) )
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month_day[i]=29;
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else month_day[i]=28;
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break;
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}
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day=day+month_day[i-1];
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if((day+1)%7==0)
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month_one_weekday[i]=7;
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else month_one_weekday[i]=(day+1)%7;//month_one_weekday[i]:第i个月的第一天是星期几
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}
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for(i=1;i<=12;i++)//每循环一次输出一个月的日历
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{
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printf("\n\n");
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printf("\n%2i月\n\tSun\tMon\tTue\tWed\tThur\tFri\tSat\n",i);
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for(j=1,m=0;j<=month_day[i];j++)//j:每个月的每一天； ?m：已经输出的天数
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{
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if(j==1)
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{
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q=month_one_weekday[i]-1;
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for(k=1;k<=q;k++)
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printf("\t");
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printf("\t%d\t",j);m=q+1;
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}
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else { printf("%d\t",j);m++;}
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if(m%7==0)
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printf("\n\t ");
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}
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}
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}
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void year_month_calendar()
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{
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int year,month,day=0;
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int i,j,k,n,m,q;
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int month_day[13],month_one_weekday[13];
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printf("\n请输入要查询日历的年月：");
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scanf("%d%d",&year,&month);
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day=0;
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for(i=1;i<=year-1;i++)
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{
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if( year%400==0 || (year%4==0&&year%100!=0) )
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n=366;
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else n=365;
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day=day+n;
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}
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month_day[0]=0;
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for(i=1;i<=12;i++)
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{
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switch(i)
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{
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case 1:case 3:case 5:case 7:
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case 8:case 10:case 12: month_day[i]=31;break;
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case 4:case 6:case 9:case 11: month_day[i]=30;break;
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case 2:if( year%400==0 || (year%4==0&&year%100!=0) )
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month_day[i]=29;
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else month_day[i]=28;
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break;
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}
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day=day+month_day[i-1];
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if((day+1)%7==0) month_one_weekday[i]=7;
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else month_one_weekday[i]=(day+1)%7;//month_one_weekday[i]:第i个月的第一天是星期几
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}
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printf("%d年的第%d月日历是:\n",year,month);
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printf("要查询的当月共计多少天：%d\n",month_day[month]);
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printf("\n%2i月：Sun\tMon\tTue\tWed\tThur\tFri\tSat\n",month);
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for(j=1,m=0;j<=month_day[month];j++)//j:每个月的每一天； ?m：已经输出的天数
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{
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if(j==1)
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{
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q=month_one_weekday[month]-1;
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for(k=1;k<=q;k++)
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printf("\t");
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printf("\t%d\t",j);m=q+1;
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}
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else { printf("%d\t",j);m++;}
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if(m%7==0)
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printf("\n\t");
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}
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}
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void year_month_day_calendar()
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{
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int year,month,dayy,day,day1,day2,weekday,flag,n1,n2,n,i;//n--距离今天还有多少天，dayy--输入的day
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int month_day[13];
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struct tm *local;
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time_t t;
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printf("\n请输入查询的年月日：");
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scanf("%d%d%d",&year,&month,&dayy);
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printf("输入的日期是：%d年%d月%d日！",year,month,dayy);
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if((month==1&&dayy==1) || (month==5&&dayy==1) || (month==10&&dayy==1))
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printf("输入日期是法定假日！\n");
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else printf("输入日期不是法定假日！\n");
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day=0;
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for(i=1;i<=year-1;i++)
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{
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if( year%400==0 || (year%4==0&&year%100!=0) )
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n=366;
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else n=365;
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day=day+n;
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}
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day1=day;
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month_day[0]=0;
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for(i=1;i<=12;i++)
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{
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switch(i)
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{
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case 1:case 3:case 5:case 7:
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case 8:case 10:case 12: month_day[i]=31;break;
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case 4:case 6:case 9:case 11: month_day[i]=30;break;
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case 2:if( year%400==0 || (year%4==0&&year%100!=0) )
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month_day[i]=29;
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else month_day[i]=28;
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break;
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}
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}
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for(i=1,n1=0;i<=month-1;i++)
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day1=day1+month_day[i];
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day1=day1+dayy;
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n1=day1; //n1--公元1年1月1日，到输入日期的天数；
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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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month=local->tm_mon+1;
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dayy=local->tm_mday;
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printf("\n今天的日期是：%d年%d月%d日。\n",year,month,dayy);
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day2=day;
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for(i=1;i<=12;i++)
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{
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switch(i)
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{
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case 1:case 3:case 5:case 7:
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case 8:case 10:case 12: month_day[i]=31;break;
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case 4:case 6:case 9:case 11: month_day[i]=30;break;
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case 2:if( year%400==0 || (year%4==0&&year%100!=0) )
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month_day[i]=29;
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else month_day[i]=28;
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break;
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}
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}
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for(i=1,n2=0;i<=month-1;i++)
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day2=day2+month_day[i];
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day2=day2+dayy;
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n2=day2; //n2--公元1年1月1日，到当前日期的天数；
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if(n2>n1)
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printf("输入日期距离当前系统日期还有%d天！\n",n2-n1);
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else
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printf("输入日期距离当前系统日期还有%d天！\n",n1-n2);
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if((month==1&&dayy==1) || (month==5&&dayy==1) || (month==10&&dayy==1))
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printf("当前日期是法定假日！\n");
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else printf("当前日期不是法定假日！\n");
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int week;
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week=n1%7-1;
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switch(week)
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{
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case 0:
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{
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printf("星期日");
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break;
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}
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case 1:
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{
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printf("星期一");
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break;
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}
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case 2:
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{
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printf("星期二");
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break;
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}
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case 3:
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{
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printf("星期三");
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break;
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}
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case 4:
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{
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printf("星期四");
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break;
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}
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case 5:
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{
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printf("星期五");
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break;
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}
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case 6:
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{
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printf("星期六");
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break;
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}
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}
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}
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