Q. Decimal to Binary conversion ?

THE OUTPUT WOULD  BE

#include<stdio.h>
#include<conio.h>
  void main( )
  { clrscr( );
int n,r[25],i,a=0;
printf("Enter a Decimal no.:");
scanf("%d",&n);
for(i=1;i<25;i++)
{ r[i]=n%2;
          n=n/2;
          a++;
          if(n==0)
          break;
}
printf("The binary conversion :\n");
for(i=a;i>=1;i--)
printf("%d",r[i]);
getch( );
  }