STL::MAP: Printing values only once ..

From:
Rahul Mathur <srivmuk@gmail.com>
Newsgroups:
comp.lang.c++
Date:
Fri, 17 Jan 2014 18:39:21 -0800 (PST)
Message-ID:
<d11d9bf9-8fdb-423f-a7a3-0b23f5ed6dad@googlegroups.com>
Hi,

I have a input.txt file separator by pipe '|' as -

40147|181|ORANGE|MIKE|XX||1000397900|3500
40148|373|ORANGE|BOB|XX||1078889400|4500
40149|673|ORANGE|TREY|XX||1095159900|5500

I only wish to have all the FIRST(ID=40147) and LAST FIELD(PRICE=3500) to be printed for three lines as given above.

I am reading as -

--
#include <iostream>
#include <fstream>
#include <sstream>
#include <string>
#include <boost/algorithm/string.hpp>

using namespace std;

struct FILE_INPUT {
        int ID;
        int Asset_ID;
        char T_Name[];
        char Symbol[];
        char Series[];
        char Gap;
        int Date;
        int price;
};

int main() {

        typedef std::map<int, int> unordmap;
        unordmap ask;

        FILE_INPUT fl_inp;
        memset( &fl_inp, 0, sizeof(fl_inp) );
        ifstream in ("input.txt");
        string s;

        const char delimiter = '|';
        while ( getline (in, s) ) {
        trim( s );
        if ( !s.empty() ) {
                stringstream strm( s );
                string item;
                getline( strm, item );
                stringstream stra( item );
                string tmp;
                getline( stra, tmp, delimiter );
                {
                       stringstream strb( tmp );
                       strb >> fl_inp.ID;
                }
                getline( stra, tmp, delimiter )
                {
                       stringstream strb( tmp );
                       strb >> fl_inp.price;
                }

                ask.insert( std::make_pair((fl_inp.ID),(fl_inp.price)) );
                unordmap::iterator pos = ask.begin();
                for (pos = ask.begin(); pos != ask.end(); ++pos) {
                        std::cout << "ID: " << pos->first << "\t"
                        << "Price: " << pos->second << std::endl;
                }
                std::cout << " " << endl;
        }
     }
}
--

The map is being inserted with both ID as key and price as value but while printing it prints the values thrice as -

ID: 40147 Price: 3500

ID: 40147 Price: 4500
ID: 40148 Price: 5500

ID: 40147 Price: 3500
ID: 40148 Price: 4500
ID: 40149 Price: 5500

The MAP should print all values together only once as -

ID: 40147 Price: 3500
ID: 40148 Price: 4500
ID: 40149 Price: 5500

--

Can I maintain some checks to print all values simply once.

Thanks.

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