PROGRAM: Calculating the Age??

#include<constream.h>
#include<stdio.h>
#include<dos.h>
void main(void)
{
 clrscr();
int a,c,y,day,month,year;
struct date d;
getdate(&d);
textmode(3);printf("\t\t\t\t\tAGE CALCULATOR\n\n");
for(int ac=1;ac<=80;ac++)
{
printf("\xdb");
}
printf("\n");
printf("ENTER AGE WHEN U WERE BORN IN  THE FORM DAYS:MONTHS:YEAR\n ");
scanf("%d:%d:%d",&a,&c,&y);

for(int acd=1;acd<=80;acd++)
{
printf("\xcd");
}
printf( "CURRENT DATE IS %d:%d:%d\n",d.da_day,d.da_mon,d.da_year);
for(int ace=1;ace<=80;ace++)
{
printf("\xcd");
}
day=d.da_day-a;
month=d.da_mon-c;
year=d.da_year-y;
if(day<0)
{
day=day+30;
month=month-1;
}
if(month<0)
{
month=month+12;
year=year-1;
}

if(day<0 && month<0)
{
day=day+30;
month=month-1;
month=month+12;
year=year-1;
}
printf("Your Age is %d: %d: %d\n",day,month,year);
printf("YOU ARE %d YEARS,%d MONTHS And %d dAYS old\n",year,month,day);
if(year>=12 && year<=18 )
{
printf("YOU ARE TEENAGER");

for(int ce=1;ce<10;ce++)
{
delay(500);

printf(".");
}
printf("luv u");
 }

 if(year>=19 && year<=35 )
{
printf("YOU ARE YOUNG MAN");

for(int ce=1;ce<10;ce++)
{
delay(500);

printf(".");
}
  printf("Mhmmmmm hAndsom");
 }
  if(year>=36)
{
printf("YOU ARE OLD MAN");

for(int ces=1;ces<10;ces++)
{
delay(500);

printf(".");
}
printf("BUzZZ offff....Hahaha");
 }
getch();
}