print the unordered map values when key value is given as input

Question

I have written the code to read the string values and mapped as key and value. Now I am facing issue in printing the values, if we have given key value as input from unordered map. below is the code. for example if we choose 1 as option that is key is Server and output should be "IN-OLDEB-1" as value.

Data in file as below:

[Server]
IN-OLDEB-1;
[Location]
\\IN-kkkk\PP620DAT;
[ServerAppName]
OPOPAPP;
[DBShareName]
PP620DAT;
[Commits]
10;
[DeTablePath]
\\CDM\DRGdddTBL;

---

#include "stdafx.h"

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

using namespace std;

int main()

{

    ifstream myfile;

    myfile.open("Wconfig.sys");
unordered_map <string, string> database;
    string tag, value;
    if (myfile.is_open())

{
    while (!myfile.eof())
    {

        getline(myfile, tag);
        getline(myfile, value);
        value.pop_back();
        database[tag.substr(1, tag.size() - 2)] = value;
        //database[tag] = value;
        //cout << database["ServerName"] << endl;
    }


string tag_array[] = {
        "Server",
        "Location",
        "ServerAppName",
        "DBShareName",
        "Commits",
        "DeTablePath"};

cout << "Enter your option: " << endl
        << "1 - Server" << endl
        << "2 - Location" << endl
        << "3 - ServerAppName" << endl
        << "4 - DBShareName" << endl
        << "5 - Commits" << endl
        << "6 - DeTablePath" << endl;


int n;
while (cin >> n) 
{
    cout << n << endl;
    if (n >= 1 && n <= 6)
        cout << endl << database[tag_array[n - 1]] <<endl;
    else
        cout << endl << "Enter Valid Input" << endl;
}
return 0;
}

Answer 1

There are several options:

If unordered_map_name is tha map, and "specific string" is the key that you want to print:

1: cout << unordered_map_name.at("specific string") << endl;

2: cout << unordered_map_name["specific string"] << endl;

3: cout << unordered_map_name.find("specific string")->second << endl;