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little calendar.cpp
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#include <stdio.h>
int leap_check(int year)
{
if((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0))
{
return 1;
}
return 0;
}
int monthDay(int year, int m)
{
if(m == 4 || m == 6 || m == 9 || m == 11)
{
return 30;
}
else
{
if(m != 2)
{
return 31;
}
else
{
if(leap_check(year))
{
return 29;
}
else
{
return 28;
}
}
}
}
int week(int year, int month, int day)
{
if(month==1 || month==2)
{
year--;
month += 12;
}
int c = year/100;
int y = year - c*100;
int w =(c/4)-2*c+(y+y/4)+(13*(month+1)/5)+day-1;
while(w < 0)
{
w += 7;
}
w %= 7;
return w;
}
int main()
{
char month[12][5] = {"Janu", "Febr", "Marc", "Apri", "May", "June", "July", "Augu", "Sept", "Octo", "Nove", "Dece"};
int y, m, w;
while(~scanf("%d%d", &y, &m))
{
printf("%s, %d\n---------------------------\n", month[m - 1], y);
printf("Sun Mon Tue Wed Thu Fri Sat\n---------------------------\n");
w = week(y, m, 1);
switch(w)
{
case 0:
{
printf(" 1 2 3 4 5 6 7\n 8 9 10 11 12 13 14\n 15 16 17 18 19 20 21\n 22 23 24 25 26 27 28\n");
if(monthDay(y, m) == 31)
{
printf(" 29 30 31\n");
break;
}
if(monthDay(y, m) == 30)
{
printf(" 29 30\n");
break;
}
if(monthDay(y, m) == 29)
{
printf(" 29\n");
break;
}
printf("\n");
break;
}
case 1:
{
printf(" 1 2 3 4 5 6\n 7 8 9 10 11 12 13\n 14 15 16 17 18 19 20\n 21 22 23 24 25 26 27\n");
if(monthDay(y, m) == 31)
{
printf(" 28 29 30 31\n");
break;
}
if(monthDay(y, m) == 30)
{
printf(" 28 29 30\n");
break;
}
if(monthDay(y, m) == 29)
{
printf(" 28 29\n");
break;
}
break;
}
case 2:
{
printf(" 1 2 3 4 5\n 6 7 8 9 10 11 12\n 13 14 15 16 17 18 19\n 20 21 22 23 24 25 26\n");
if(monthDay(y, m) == 31)
{
printf(" 27 28 29 30 31\n");
break;
}
if(monthDay(y, m) == 30)
{
printf(" 27 28 29 30\n");
break;
}
if(monthDay(y, m) == 29)
{
printf(" 27 28 29\n");
break;
}
printf(" 27 28\n");
break;
}
case 3:
{
printf(" 1 2 3 4\n 5 6 7 8 9 10 11\n 12 13 14 15 16 17 18\n 19 20 21 22 23 24 25\n");
if(monthDay(y, m) == 31)
{
printf(" 26 27 28 29 30 31\n");
break;
}
if(monthDay(y, m) == 30)
{
printf(" 26 27 28 29 30\n");
break;
}
if(monthDay(y, m) == 29)
{
printf(" 26 27 28 29\n");
break;
}
printf(" 26 27 28\n");
break;
}
case 4:
{
printf(" 1 2 3\n 4 5 6 7 8 9 10\n 11 12 13 14 15 16 17\n 18 19 20 21 22 23 24\n");
if(monthDay(y, m) == 31)
{
printf(" 25 26 27 28 29 30 31\n");
break;
}
if(monthDay(y, m) == 30)
{
printf(" 25 26 27 28 29 30\n");
break;
}
if(monthDay(y, m) == 29)
{
printf(" 25 26 27 28 29\n");
break;
}
printf(" 25 26 27 28\n");
break;
}
case 5:
{
printf(" 1 2\n 3 4 5 6 7 8 9\n 10 11 12 13 14 15 16\n 17 18 19 20 21 22 23\n");
if(monthDay(y, m) == 31)
{
printf(" 24 25 26 27 28 29 30\n 31\n");
break;
}
if(monthDay(y, m) == 30)
{
printf(" 24 25 26 27 28 29 30\n");
break;
}
if(monthDay(y, m) == 29)
{
printf(" 24 25 26 27 28 29\n");
break;
}
printf(" 24 25 26 27 28\n");
break;
}
case 6:
{
if(monthDay(y, m) == 31)
{
printf(" 30 31");
}
if(monthDay(y, m) == 30)
{
printf(" 30 ");
}
printf(" 1\n 2 3 4 5 6 7 8\n 9 10 11 12 13 14 15\n 16 17 18 19 20 21 22\n");
if(monthDay(y, m) == 31)
{
printf(" 23 24 25 26 27 28 29\n");
break;
}
if(monthDay(y, m) == 30)
{
printf(" 23 24 25 26 27 28 29\n");
break;
}
if(monthDay(y, m) == 29)
{
printf(" 23 24 25 26 27 28 29\n");
break;
}
printf(" 23 24 25 26 27 28\n");
break;
}
}
printf("===========================\n");
}
return 0;
}