#include<stdio.h>
main()
{
int day, month, year, sum, leap;
printf("\nplease input year,month,day\n");
scanf("%d,%d,%d", &year, &month, &day);
switch (month)
{
case 1: sum = 0; break;
case 2: sum = 31; break;
case 3: sum = 59; break;
case 4: sum = 90; break;
case 5: sum = 120; break;
case 6: sum = 151; break;
case 7: sum = 181; break;
case 8: sum = 212; break;
case 9: sum = 243; break;
case 10:sum = 273; break;
case 11:sum = 304; break;
case 12:sum = 334; break;
default:("data error"); break;
}
sum = sum + day;
if (year % 400 == 0 || (year % 4 == 0 && year % 100 != 0))
leap = 1;
else
leap = 0;
if (leap == 1 && month > 2)
sum++;
printf("It is the %dth day.", sum);
}
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