#include <iostream>
#include <vector>
#include <algorithm>
#include <iomanip>

using string = std::string;

//Placw in header!
template <typename T>
void printm(T m){
  std::cout << m;
}

template <typename T>
void printlm(T m){
  printm(m);
  printm("\n");
}

typedef std::vector<double>::size_type vtype;

double promptd(string,bool*);

int main() {
  std::setprecision(3);
  printlm("Calculate median and average from sequence:");
  std::vector<double> v{};
  bool s {};
  do {
    auto d = promptd("Enter a number (Enter non-number to complete entry) : ",&s);
    if (s) v.push_back(d);
  }
  while(s);
  sort(v.begin(), v.end());
  printm("The count is: ");
  printlm(static_cast<int>(v.size()));
  printm("The median is: ");
  int halfway {static_cast<int>(v.size()) / 2};
  if (static_cast<int>(v.size())%2 == 1)
    printlm(v.at(static_cast<vtype>(halfway)));
  else
    printlm((v.at(static_cast<vtype>(halfway - 1)) + v.at(static_cast<vtype>(halfway))) / 2.0);
  double avg {};
  for (vtype i = 0; i < v.size(); ++i) avg += v.at(i);
  avg /= static_cast<int>(v.size());
  printm("The average is: ");
  printlm(avg);
  return 0;
}

double promptd(string message, bool *status) {
  double tr {};
  *status = false;
  std::cout << message;
  if (!(std::cin >> tr)){
    std::cin.clear();
    std::cin.ignore();
    return 0;
  }
  *status = true;
  return tr;
}