What's wrong with this code?

Question

import java.util.Scanner;

//your code goes here

public class Program {
public static void main(String[ ] args) {
Scanner sc = new Scanner(System.in);
int x = sc.nextInt();
System.out.print(Converter.toBinary(x));
String binary="";
while(num>0){
binary = (num%2)+binary;
num /=2;
}
}
}

Answer 1

This is not working.

Answer 2

Refer to my code

https://code.sololearn.com/cRhEfse0Tzp5/?ref=app