main.cpp

#include <iostream>
#include <stdexcept>
#include "Query.h"
#include "TextQuery.h"
#include "QueryResult.h"
using namespace std;
int main(int argc, char **argv)
{
    ifstream infile(argv[1]);
    if (!infile) { cerr << "No input file!" << endl; exit(1); }
    TextQuery tq(infile);
 tq.display_map();
    while (true)
    {
    cout << "Enter search command, or q to quit:" << endl;
    string line;
    getline(cin, line);
    if (line.empty() || line == "q") break;
        shared_ptr<QueryBase> q;
        try {
            q = QueryBase::factory(line);
	}
	catch( const invalid_argument& e ) {
            cout << e.what() << endl << endl;
	    continue;
	}
    print(cout, q->eval(tq)) << endl;
    }
return(0);
}