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

// on other systems you would need to put
//     using namespace std;
// here. I eliminated it on rabbit.

struct element
{   string name, symbol;
    double weight; };

element table[105];

// setting the array size to the "exactly right" 105 is not
// good design. One day the data file may be bigger, and
// the program would just stop working properly.

element make(string s, string n, double w)
{   element r;
    r.symbol=s;
    r.name=n;
    r.weight=w;
    return r; }

void print(element e)
{ cout << e.name
       << " (" << e.symbol << ") "
       << "at.wt.=" << e.weight << "\n"; }

void read()
{  ifstream efile("elements.txt");
   if (efile.fail())
   {  cerr << "Can't open 'elements.txt'\n";   // remember why it's cerr not cout.
      exit(1); }
   for (int i=1; i<=104; i+=1)  // again, the exact 104 is not great design.
   { string sy, nm;
     double wt;
     efile >> sy >> nm >> wt;
     if (efile.fail())          // remember why fail() must be tested right here.
        break;
     table[i]=make(sy, nm, wt); }
   efile.close(); }

void test()
{  print(table[11]);
   print(table[57]);
   print(table[103]); }

void main()
{ read();
  test(); }