convert day into year,month,week & days

/*convert day into year,month,week & days*/

#include<stdio.h>
#include<conio.h>
void main()
{
int a,year,month,ry,rm,week,rw,days;
clrscr();
printf("enter day\n");
scanf("%d",&a);
year=a/365;
ry=a%365;
month=ry/30;
rm=ry%30;
week=rm/7;
rw=rm%7;
days=rw;
printf("year=%d",year);
printf("\nmonth=%d",month);
printf("\nweek=%d",week);
printf("\ndays=%d",days);
getch();
}