/******************************************************************************************
ex8.cpp
******************************************************************************************/
#include <iostream>
#include <string>
#include <fstream>
using namespace std;

// class definitions
class person {
    public:
        string first;
        string last;
        string state;
};

class state {
    public:
        string full;
        string token;
        int count;
        float percent;
};

// prototypes
void readFile(string filename, person [], const int maximum, int& size);
int TallyByState(string token, person [], const int size);
void fullTally(state [], const int, person [], const int);
void displayResults(state list[], const int count);

// MAIN!
void main() {
    const int StateCount=4;
    state Tally[StateCount];

    Tally[0].full = "New York", Tally[0].token = "NY";
    Tally[1].full = "New Jersey", Tally[1].token = "NJ";
    Tally[2].full = "Connecticut", Tally[2].token = "CT";
    Tally[3].full = "Virginia", Tally[3].token = "VA";

    int count=0;
    const int maxsize=100;
    person census[maxsize];

    string filename;
    cout << "Enter the file to read for CENSUS DATA: ";
    cin >> filename;
    readFile(filename, census, maxsize, count);

    fullTally(Tally, StateCount, census, count);
    displayResults(Tally, StateCount);
}

//------- show all the results ------
void displayResults(state list[], const int count) {
    int i;
    for (i = 0; i < count; i++)
        cout << list[i].count << " records from "<< list[i].full << endl;
    cout << endl;

    for (i = 0; i < count; i++)
        cout << list[i].percent*100 << "% of records from "<< list[i].full << endl;
}

//------- do all the calculations ------
void fullTally(state criteria[], const int critCount, person data[], const int dataCount) {
    for (int i = 0; i < critCount; i++) {
        criteria[i].count = TallyByState(criteria[i].token, data, dataCount);
        criteria[i].percent = (float)criteria[i].count/dataCount;
    }
}

//------- return the count of records where state matches the token ------
int TallyByState(string token, person list[], const int size) {
    int count = 0;
    for (int i = 0; i < size; i++)
        if (list[i].state == token)
            count++;
    return count;
}

//------- fill each person in the list from a file ------
void readFile(string filename, person people[], const int maximum, int& size) {
    ifstream fin(filename.c_str());
    for (int i=0; i < maximum; i++) {
        if(fin >> people[i].first >> people[i].last >> people[i].state)
            size++;
    }
}