Tutorial 4 Section B [DecToBin]

//http://pastebin.com/u/TheWhiteFang
//Tutorial 4 Section B
//credits to sasi :P
#include <iostream>
#include <string>

using namespace std;


string DecToBin(int num){


    if(num==0) return "0"; //recursive call
    if(num==1) return "1";

    if(num %2 == 0) //rec base
        return DecToBin(num /2) + "0";

    else
        return DecToBin(num/2) + "1";
}

int main(){


    int num = 0;
    cout <<"Enter any positive integer number ";
    cin >> num;
    string ans = DecToBin(num);
    cout << "Binary of " << num << "is: " << ans <<endl;

    return 0;
}