DS Questions - Question 2 - C++

q2.cpp

#include<iostream>
using namespace std;

long long binaryOf(int a){
	return a?binaryOf(a/2)*10 + a%2:0;
}

int main(){
	int a;
	cin>>a;
	cout<<binaryOf(a);
	cout<<endl<<"Press any key to continue..."<<endl;
	getchar();
	getchar();
	return 0;
}