查找某一日期所对应的日历表,这一天是所在年份的第几天,这一天是星期几,打印月份日历表:
#include
#include
int isleap(int year)
{
if ((year % 4 == 0) && (year % 100 != 0) || (year % 400 == 0))
return 1;
else
return 0;
}
int max_day(int year, int month)
{
int day[12] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
if (isleap(year) == 1)
day[1] = 29;
return day[month - 1];
}
int total_day(int year, int month, int day)
{
int sum = 0;
int i = 1;
for (i = 1; i < month; i++)
sum += max_day(year, i);
sum += day;
return sum;
}
int weekday(int year, int month, int day)
{
int count;
count = (year - 1) + (year - 1) / 4 - (year - 1) / 100 + (year - 1) / 400 + total_day(year, month, day);
count %= 7;
return count;
}
void display_week(int year, int month, int day)
{
int count;
count = weekday(year, month, day);
switch (count)
{
case 0:printf("\t%d-%d-%d is Sunday\n", year, month, day); break;
case 1:printf("\t%d-%d-%d is Monday\n", year, month, day); break;
case 2:printf("\t%d-%d-%d is Tuesday\n", year, month, day); break;
case 3:printf("\t%d-%d-%d is Wednesday\n", year, month, day); break;
case 4:printf("\t%d-%d-%d is Thursday\n", year, month, day); break;
case 5:printf("\t%d-%d-%d is Friday\n", year, month, day); break;
case 6:printf("\t%d-%d-%d is Saturday\n", year, month, day); break;
default:system("cls");
printf("error\n");
}
}
void display_month(int year, int month, int day)
{
int i = 0, j = 1;
int week, max;
week = weekday(year, month, 1);
max = max_day(year, month);
printf("\n\t\t\t\t%d年%d月",year,month);
printf("\n");
printf("\n\t日\t一\t二\t三\t四\t五\t六\n\n");
for (i = 0; i < week; i++)
printf("\t");
for (j = 1; j <= max; j++)
{
printf("\t%d",j);
if (i % 7 == 6)
printf("\n\n");
i++;
}
printf("\n\n");
}
int main()
{
int year, month, day;
printf("Please enter year,month,day:");
scanf_s("%d%d%d", &year, &month, &day);
if (month<1 || month>12 || day<1 || day>31)
{
printf("error!");
return -1;
}
printf("%d年%d月%d日是这年的第%d天\n", year, month, day, total_day(year, month, day));
display_week(year, month, day);
display_month(year, month, day);
system("pause");
return 0;
}
例如:输入2018年3月24日,运行结果如下: