Recursion Funtion Problem

I am unable to write a recursive function that takes in a vector of numbers and returns the median.
double median (vector <double> vec)
{
typedef vector<double> :: size_type vec_sz;
vec_sz size = vec.size();
if (size==0)
return false;
sort(vec.begin(), vec.end());
vec_sz mid = size/2;
return size%2 ==0 ?(vec[mid]+vec[mid-1])/2 : vec[mid];
}

Could anyone convert the into a recursive function call .

Thanking you in advance for your reply and time.

I won't write your code, but I see there that you have missed the basics of refursive functions: The function calls itself. THis is how the basicas should look:

Code:

---

double median(vector <double> vec)
{
    if(vec.size() != 0){
        return median(vec);
  }else{
        return 0;
  }
}

---

Now, before returning median(vec), do your median calculations...