int days_of_year(int year,int mon,int day)
{
int days_of_mon[12] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
int i, days;
if (leap(year)==1) /* 如果是闰年,则这年的2月有29天 */
days_of_mon[1]=29;
else
days_of_mon[1]=28;
days = 0;
for ( i = 0; i < mon - 1; i++ )
days += days_of_mon[i];
days += day;
return days;
}
/*============================================================================*/