WAP to Convert Decimal to Binary

/*Convert Decimal to Binary*/

#include<stdio.h>
#include<conio.h>
void main()
{
 clrscr();
 int a,b,x,y,i[5],j,r;
 printf("Enter  no.");
 scanf("%d",&a);
 x=a%2;
 y=a/2;
 b=(y*2)+(x);
 for(j=0;b!=0;b/=2)
 {
  i[j]=b%2;
  j++;
 }
 for(r=j-1;r>=0;r--)
 {
  printf("%d",i[r]);
 }
 getch();
}