Wap to find Binnary Number of any Decimal Number using functions

#include<conio.h>
#include<stdio.h>
int binary(int);
void main()
{

int num;
clrscr();

printf("\nEnter the number");
scanf("%d",&num);

binary(num);

getch();

}

int binary(int num)
{
 int r;
 r=num%2;
 num=num/2;
 if(num==0)
 {
  printf("\nThe binary euivalent is %d",r);

 }
 else
 {
 binary(num);
 printf("%d",r);
 return(r);
}
}