Outputting words with same information from a text file

[badatcoding67]

I have to write a program where I input a word such as "BANANA" and it will read from a text file(this is a modified version of what i am actually working on) containing this

Text File:

BANANA TA GG GZ 95 5G
APPLE AF GC CF CG CA
ORANGE CG CG VG GL CD
GRAPE CG CG VG GL CD


In console i will input:

BANANA or banana

And i get:

Code: TA GG GZ 95 5G


But where I am stuck right now is when I input Orange I want to get

Code: TA GG GZ 95 5G
Similiar fruit: Grape

This is my code

#include <iostream>
#include <fstream>
#include <string>
#include <cctype>
#include <map>

using namespace std;

//main
int main()
{
   map<string,string> index;
   string fruit, code;

   // ifstream in( "data.txt" );
   ifstream in("fruit.txt");


   while( in >> fruit >> ws && getline( in, code ) ) index[fruit] = code;

   while ( true )
   {

    cin >> fruit;
    //converting to uppercase letter

    for(int i = 0; i < fruit.length(); i++){
            fruit[i] = toupper(fruit[i]);
        }

        if (index.count(fruit)){

            cout << "CODE: " << index[fruit] << '\n' << endl;

        break;

        }
        else{

            cout << "Not found\n" << endl;

        break;

        }
    }
}

[lastchance]

@badatcoding67,
Why do you not continue with your existing thread:
http://www.cplusplus.com/forum/beginner/234068/#msg1051206
It is just confusing everyone.

Please close one of them down with a green tick.

[icy1]

Process stream as follows. Hilariously, while (iss >> fruit) instead of the for loop would duplicate the last line in stream.

#include <iostream>
//#include <fstream>
#include <sstream>
#include <string>
#include <map>

using namespace std;

//main
int main()
{
    const char* data_text = R"LITERAL(
BANANA TA GG GZ 95 5G
APPLE AF GC CF CG CA
ORANGE CG CG VG GL CD
GRAPE CG CG VG GL CD
)LITERAL";

    // Imitate file stream
    istringstream iss(data_text);
    
    map<string,string> index;
    string fruit;
    string rest;
    
    for ( ; iss>>fruit; )
    {
        getline(iss, rest);
        
        cout << "found fruit \""<<fruit << "\" and rest of string is \"" << rest << "\".\n";
    }

    return 0;
}

In action: https://repl.it/repls/UglyUniformDifference

[icy1]

I just realized you purposely want two-way lookup. Do you have access to boost (bi-directional map)? Or you could make custom class that links map<a,b> with a map<b,a>.

Edit: nevermind, since the reverse would make it not have unique keys. Not sure which data structure to use for the reverse... How many items are we talking about?

[icy1]

should be fully working now at the same link, https://repl.it/repls/UglyUniformDifference .

Uses a map<string,string> to store fruit to the "rest" (code).
Uses a map<string,int> to track frequency of "rest". Only if search term's "rest" has turned up more than once, then a full pass of the original map is done to spit out all similar fruits.

Edit: cleaned up a bit.

#include <iostream>
#include <sstream>
#include <string>
#include <algorithm>
#include <map>

using namespace std;

int main()
{
    const char* data_text = R"LITERAL(
BANANA TA GG GZ 95 5G
APPLE AF GC CF CG CA
ORANGE CG CG VG GL CD
GRAPE CG CG VG GL CD
)LITERAL";

    // Imitate file stream
    istringstream iss(data_text);
    
    map<string, string> fruit_to_rest;
    map<string, int> rest_seen;
    string fruit;
    string rest;
    
    for ( ; iss>>fruit; )
    {
        getline(iss, rest);
        fruit_to_rest[fruit] = rest;
        rest_seen[rest] += 1;
        
        //cout << "found fruit \""<<fruit << "\" and rest of string is \"" << rest << "\".\n";
    }

    cout << "\n\n";
    cout << "Enter 'q' to quit.\n";
    
    string search_term;
    while (true)
    {
        cout << "\nSearch term? ";
        cin >> search_term;
        if (search_term=="q")
            break;
    
        std::transform(search_term.begin(), search_term.end(), search_term.begin(), ::toupper);
        if (fruit_to_rest.count(search_term))
        {
            if (rest_seen[fruit_to_rest[search_term]] > 1)
            {
                cout << "Similar items: ";
                for (auto& item : fruit_to_rest)
                {
                    if (fruit_to_rest[search_term] == item.second)
                        cout << item.first << " ";
                }
                cout << endl;
            }
            cout << "Code for fruit "<<search_term<<" is " << fruit_to_rest[search_term] << endl;
        }
        else
        {
            cout << "Fruit \""<<search_term<<"\" not found.\n";
        }
    }

    return 0;
}