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

using namespace std;

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

int readfile(element A[], int max)
{ ifstream f("/home/www/class/een118/a3010b.txt");
  if (f.fail())
  { cout << "Can't read the data file\n";
    exit(1); }

  int pos = 1;
  while (true)
  { if (pos >= max)
    { cout << "The array isn't big enough\n";
      exit(1); }
    f >> A[pos].symbol >> A[pos].name >> A[pos].atwt;
    if (f.fail())
      break;
    A[pos].atno = pos;
    pos += 1; }

  f.close();

  A[0].atno = 0;
  A[0].symbol = "Error";
  A[0].name = "Error";
  A[0].atwt = 0.0;

  return pos - 1; }

void printtable(element A[], int N)
{ for (int i = 1; i <= N; i += 1)
    cout << i << ": " << A[i].atno << " " << A[i].symbol << " " << A[i].name << " " << A[i].atwt << "\n"; }

element find(string wanted, element A[], int num)
{ for (int i = 1; i <= num; i += 1)
    if (A[i].symbol == wanted)
      return A[i];
  return A[0]; }

int main()
{ const int arraysize = 200;
  element table[arraysize];
  int number = 0;

  number = readfile(table, arraysize);

  while (true)
  { cout << "? ";
    string s;
    cin >> s;
    element r = find(s, table, number);
    if (r.atno == 0)
      cout << "Element " << s << " is unknown\n";
    else
      cout << r.atno << " " << r.symbol << " " << r.name << " " << r.atwt << "\n"; } }