Find binary of a Number

Write a function to print the binary value of the number passed to it, and function should not use any variables other than the parameter passed to it.

Answer : We need to use recursion for this, and here is my version of the C code for the same

#include <stdio.h>

void printBinary(int k)
{
    if(k != 0)
    {
        printBinary(k/2);
    }
    printf("%d", k%2);
}
void main(void)
{
    int k = 4561;
    printBinary(k);
}