// simple program to ask for a file name and 
// then open the file for reading
// This version doesn't do error checking
//
// reads in a valid 9x9 Sudoku puzzle and reports on how many
// cells contain each of the digits and how many are empty
// 
// Beth Katz, February 2006

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

using namespace std;

int main( )
{
   string filename;
   char ch;
   int empty = 0;
   int digits[10] = {0};  
   
   cout << "Enter name of file: ";
   cin >> filename;

   ifstream theFile(filename.c_str( ));

   for (int i = 1; i <= 81; i++) {
      theFile >> ch;
      if ('.' == ch) {
         empty++;
      } else if ('1' <= ch && ch <= '9') {
         digits[ch - '0']++;
      }
   }

   cout << empty << " empty cells." << endl;

   for (int i = 1; i <= 9; i++) {
      if (digits[i] > 0) {
         cout << digits[i] << " " << char('0'+i) << "s" << endl;
      }
   }

   return 0;
}