//传入参数分别为年、月、日。
int getWeek(int y, int m, int d)
{
if(m==1||m==2)
{
m+=12;
y--;
}
return (d+2*m+3*(m+1)/5+y+y/4-y/100+y/400)%7+1;
}
int main(void)
{
char weekDay;
weekDay=getWeek(19,2,26);
printf("now time=2019/2/26 week=%d\r\n",weekDay);
return 0;
}