算日期是星期几

  
char WeekList[ ][7]={"星期一", "星期二", "星期三", "星期四", "星期五", "星期六", "星期日"};  
  
void (int y,int m, int d)  
{  
    if (m==1 || m==2)  
    {  
        m+=12;  
        y--;  
    }  
    int iWeek=(d+2*m+3*(m+1)/5+y+y/4-y/100+y/400)%7;  
    printf("%sn", WeekList[iWeek]);  
}  
int main()  
{  
    int year=0,month=0,day=0;  
      
    printf("请输入日期(2000-1-1):");  
    scanf("%d-%d-%d",&year,&month,&day);  
    dateToWeek(year,month,day);  
  
    return 0;  
}