struct date
{
int year;
int month;
int day;
}dat;

int date(int y,int m,int d)
{
    int a;
    dat.year=y;
    dat.month=m;
    dat.day=d;
    if(dat.month-1==0) a=0;
    if(dat.month-1==1) a=31;
    if(dat.month-1==2) a=59;
    if(dat.month-1==3) a=90;
    if(dat.month-1==4) a=120;
    if(dat.month-1==5) a=151;
    if(dat.month-1==6) a=181;
    if(dat.month-1==7) a=212;
    if(dat.month-1==8) a=243;
    if(dat.month-1==9) a=273;
    if(dat.month-1==10) a=304;
    if(dat.month-1==11) a=334;
    a=a+dat.day;
    if(dat.year%4==0&&dat.year%100!=0) a=a+1;
    return a;
}

main()
{int y,m,d,a;
printf("Please put in Year: ");
scanf("%d",&y);
printf("Please put in Month: ");
scanf("%d",&m);
printf("Please put in Day: ");
scanf("%d",&d);
a=date(y,m,d);
printf("Today is the %d th days",a);
getch();
}