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

using namespace std;

const int max_num_els = 119;

struct element
{ string symbol, name;
  double atwt;
  int atno; };

int read_table(element table[])
{ ifstream fin("/home/www/class/een118/a3010b.txt");
  if (fin.fail())
  { cerr << "Can't open file\n";
    exit(1); }
  table[0].symbol = "??";
  table[0].name = "Does not exist";
  table[0].atwt = 9999999999.9;
  table[0].atno = 0;
  for (int atno = 1; atno <= max_num_els; atno += 1)
  { fin >> table[atno].symbol;
    fin >> table[atno].name;
    fin >> table[atno].atwt;
    table[atno].atno = atno;
    if (fin.fail())
      return atno - 1; } }

element find(element table[], int last_el, string wanted)
{ for (int i = 1; i <= last_el; i += 1)
  { if (table[i].symbol == wanted ||
        table[i].name == wanted)
      return table[i]; }
  cerr << "'" << wanted << "' not found\n";
  return table[0]; }

struct reader
{ string s;
  int pos; };

string get(reader & rdr)
{ string result = "";
  while (rdr.s[rdr.pos] == ' ')
    rdr.pos += 1;

  if (rdr.s[rdr.pos] >= 'A' && rdr.s[rdr.pos] <= 'Z')
  { result += rdr.s[rdr.pos];
    rdr.pos += 1;
    if (rdr.s[rdr.pos] >= 'a' && rdr.s[rdr.pos] <= 'z')
    { result += rdr.s[rdr.pos];
      rdr.pos += 1; } }

  else if (rdr.s[rdr.pos] >= '0' && rdr.s[rdr.pos] <= '9')
  { while (rdr.s[rdr.pos] >= '0' && rdr.s[rdr.pos] <= '9')
    { result += rdr.s[rdr.pos];
      rdr.pos += 1; } }

  else
  { cerr << "Bad character '" << rdr.s[rdr.pos] << "' in input\n";
    result += rdr.s[rdr.pos]; }
  return result; }

int main()
{ element PT[max_num_els-1];
  int n = read_table(PT);
  cout << "read " << n << " elements\n";

  reader R;
  R.pos = 0;
  cout << "Enter a formula: ";
  getline(cin, R.s);

  while (true)
  { string query = get(R);
    cout << "(symbol is '" << query << "')\n";
    if (query == ".")
      break;
    if (query[0]>='a' && query[0]<='z')
      query[0] = query[0] - ('a' - 'A');
    element X = find(PT, n, query);
    cout << X.atno << " " << X.symbol << " " << X.name << " " << X.atwt << "\n"; } }