Program to convert decimal number into binary number

/*Program to convert decimal number  into binary number*/

#include<conio.h>

#include<stdio.h>

#include<math.h>

void main()

{

int n,i,r,sum=0,x=1;

clrscr();

printf("Enter binary number:");

scanf("%d",&n);

while(n>0)

{

  r=n%2;

        sum=sum+r*x;

        n=n/2;

       x=x*10;

}

printf("dacimal number:%d",sum);

getch();

}