#include <iostream.h>
#include <fstream.h>
#include "CPstring.h"
#include "vector.h"
// file: getinfo2.cc
// author      Dietolf Ramm;  date: 11/6/96
// simple info storage and retrieval system using lines of text
//    stored in vectors of strings
// Use a struct to keep some usage statistics
const string SENTINEL = "quit";
struct data
{
   string line;
   int use;
};

void Load(Vector<data> & info, int & numLines)
// postcondition: info contains a information from file for later search
{
   string filename, s;
   cout << "Enter name of input file: ";
   getline(cin, filename);

   ifstream input;
   input.open(filename);

   while (getline(input, s))
   {
      if (numLines >= info.Length())
      {
         info.SetSize(2*info.Length());
         cout << "vector doubled" << endl;
      }
      info[numLines].line = s;
      info[numLines].use = 0;
      numLines++;
   }
   cout << numLines << " lines read." << endl;
}

void Find(Vector<data> & info, int numLines, string request)
// precondtion: info contains a information from file for search
//    numlines contains the number of lines of data this consists of
// postcondition: lines containing request as a substring are printed
{
   int k;
   for (k = 0; k < numLines; k++)
      if ( info[k].line.Contains(request) )
      {
         cout << info[k].line << endl;
         info[k].use++;
      }
}

void Report(const Vector<data> & info, int numLines)
// postcondition: lines that were referenced printed out with frequency
{
   int k;
   for (k = 0; k < numLines; k++)
      if ( info[k].use > 0 )
      {
         cout << "(" << info[k].use << ")" << endl;
         cout << info[k].line << endl;
      }
}

int main()
{
   Vector<data> info(50);
   int lines = 0;
   string request;

   Load(info, lines);

   cout << "Enter search string: " ;
   getline(cin, request);
   while (request != SENTINEL)
   {
      Find(info, lines, request);
      cout << "Enter search string: " ;
      getline(cin, request);
   }

   Report(info, lines);

   return 0;
}
Sample output:
getinfo2
Enter name of input file: /u/dr/a./nums
vector doubled
vector doubled
vector doubled
vector doubled
644 lines read.
Enter search string: Karl
    688-1871 Karl Ramm, 407 Gregson St, Apt 2, Durham, NC 27701, N1XPB
    660-6905 Karl Ramm, OIT, karl@oit.duke.edu
617-623-6763 Karl Ramm, 390 Broadway, Apt 25, Sommerville, Mass 02145
617-253-0129 office Karl Ramm,  kcr@mit.edu /mit/is/dcns/ops/syssupport/kcr
Enter search string: Gregson
    688-1871 Karl Ramm, 407 Gregson St, Apt 2, Durham, NC 27701, N1XPB
Enter search string: Munich
[011 49] 89 343277 Sieglind Ramm, BiedersteinerStr 3, 80802 Munich
Enter search string: Sieglind
[011 49] 89 343277 Sieglind Ramm, BiedersteinerStr 3, 80802 Munich
Enter search string: quit
(2)
    688-1871 Karl Ramm, 407 Gregson St, Apt 2, Durham, NC 27701, N1XPB
(1)
    660-6905 Karl Ramm, OIT, karl@oit.duke.edu
(1)
617-623-6763 Karl Ramm, 390 Broadway, Apt 25, Sommerville, Mass 02145
(1)
617-253-0129 office Karl Ramm,  kcr@mit.edu /mit/is/dcns/ops/syssupport/kcr
(2)
[011 49] 89 343277 Sieglind Ramm, BiedersteinerStr 3, 80802 Munich