Final.cpp

#include <iostream>
#include <fstream>
#include <cstring>
#include <cstdlib>
using namespace std;

//Create States structure
struct States
{
    //Variable list that corresponds to input file format
    string city;
    string state;
    string population;
};
//Function returns hard-coded filename
void get_file_name(string &filename)
{
    filename = "pop.txt";
    return;
}
//Function opens file
void open_file(fstream &object_file, string name_of_file)
{
    object_file.open(name_of_file.c_str());
    //Check for error loading file
    if (!object_file)
    {
        cout << "Error loading file\n";
        exit(0);
    }
    return;
}
//Function closes file
void close_file(fstream &object_file)
{
    object_file.close();
    return;
}
//Get user input
string user_input()
{
    string user_input;
    cout << "What state are you looking for?\n";
    cin >> user_input;
    return user_input;
}
//Search for and display cities in the state defined by user
void display_cities(string input, fstream &input_file)
{
    string city, state, population;
    States temp;
        while (!input_file.eof())
        {
        getline(input_file, city);

        getline(input_file, state);

        getline(input_file, population);

        temp.city = city;
        temp.state = state;
        temp.population = population;

        if(temp.state == input)
        {
            cout << temp.city << endl;
        }
        }

}
int main()
{
    string filename, state;
    fstream data_store;
    //Retrieve filename to work with
    get_file_name(filename);
    //Open the file
    open_file(data_store, filename);
    //Get input from user - name of state
    state = user_input();
    //Process file
    display_cities(state, data_store);
    //Close file
    close_file(data_store);

    return 0;
}