Recursion

#include <iostream>
#include <string>
#include <cstdlib>
#include <fstream>

using namespace std;

void sign(int, ofstream&);
void reverseString(const string&, ofstream&);

int main()
{
    int s;
    string k;
    ofstream outfile("c:\\USERS\\STUDENT\\Desktop\\outfile.txt");

    cout << "Enter an integer" << endl;
    cin >> s;
    sign(s, outfile);

    outfile<< endl;

    cout << "Enter a string" << endl;
    cin >> k;
    reverseString(k, outfile);


    return 0;
}


void sign(int n, ofstream &outfile)
{

    if (n==0)
    {
        return;
    }
    else
    {
    outfile << "No Parking" << endl;
    sign(--n, outfile);
    return;
    }

}

void reverseString(const string& str, ofstream &outfile)
{
    int n = str.size();
    if(n == 1)
    {
        outfile << str << endl;
        return;
    }

    else
    {
        outfile << str[n-1];
       string temp = str.substr(0, --n);
       reverseString(temp, outfile);
       return;
    }
}