运算失败是哪里错了
#include <stdio.h>
int main()
{
/* 定义需要计算的日期 */
int year = 2008;
int month = 8;
int day = 8;
int sum;
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;
}
if([year % 400 = 0|| !(year % 4 == 0) && year % 100 != 0] && month > 2)
{
sum += day + 1;
printf("%d年%d月%d日是该年的第%d天",year, month, day, sum);
}
else
{
sum += day;
printf("%d年%d月%d日是该年的第%d天",year, month, day, sum);
}
return 0;
}