#include <iostream>
#include <fstream>
#include <cctype>
#include <stdexcept>
#include <limits>

using namespace std;

int main(int argc, char* argv[])
{
  if ( argc != 2 )
  {
    cerr << "ERROR: solution file argument missing." << endl;
    return 0;
  }

  ifstream ifs(argv[1]);
  
  if ( ! ifs )
  {
    cerr << "ERROR: solution file could not be opened." << endl;
    return 0;
  }

  string given_answer, rest_of_line;
  cout << "Please enter given answer: ";
  cin >> given_answer;
  unsigned int i = 0;
  int score = 0;

  try
  {
    char correct_answer;
    while ( ifs >> correct_answer )
    {
      if ( tolower(given_answer.at(i++)) == tolower(correct_answer) )
        ++score;
      ifs.ignore(numeric_limits<streamsize>::max(), '\n');
    }
  }
  catch (out_of_range& e)
  {
    cout << "WARNING: too few questions answered." << endl;
  }
  if ( given_answer.size() > i )
  {
    cout << "WARNING: too many questions answered." << endl;
  }
  
  cout << score << " point(s)." << endl;
  
  return 0;
}