/******************************************************************************************
ex3.cpp
    Working our way to dynamic criteria
    Counting function that gets criteria passed to it
******************************************************************************************/
#include <iostream>
#include <string>
#include <fstream>

using namespace std;

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

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

// MAIN!
void main() {
    int count=0;
    const int maxsize=100;
    person census[maxsize];

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

    cout.precision(0);
    cout.setf(ios::fixed);

    int countNY = TallyByState("NY", census, count);
    cout << countNY << " records from New York." << endl;
    float percentNY = (float)countNY/count;
    cout << percentNY*100 << "% of records from New York." << endl;

    int countNJ = TallyByState("NJ", census, count);
    cout << countNJ << " records from New Jersey." << endl;
    float percentNJ = (float)countNJ/count;
    cout << percentNJ*100 << "% of records from New Jersey." << endl;

}

//------- 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++;
    }
}