//Fall 2011 Answers
//Exam 1, questions 4 and 5
//Train class

//only need these 2 lines of code for question 5
#include<iostream>
using namespace std;

//Qeustion 4
class Train
{
private:
        int id;
        bool seats; // true means separate seats, false means benches
        char route;
public:
    //destructor (only prototype)
    ~Train();

    //default constructor
    Train()
    {
        seats = false;
    }

    //overloaded constructor accepts 2 args
    Train(int i, char r)
    {
        id = i;
        route = r;
        seats = false;
    }

    //accessor functions
    int getId()
    {
        return id;
    }

    char getRoute()
    {
        return route;
    }

    bool getSeating()
    {
        return seats;
    }

    //mutator functions
    void setId(int i)
    {
        id = i;
    }

    void setRoute(char r)
    {
        route = r;
    }

    void setSeating(bool s)
    {
        seats = s;
    }

    //toggle seating to other mode
    void changeSeating()
    {
        if (seats)
            seats = false;
        else
            seats = true;
    }
};
/*
int main()
{
    Train NYsubway(5685, 'M');
}
*/

//define destructor function so that can run a program that allocates Train objects
    Train::~Train(){};

//Question 5
//part b: utility function to calculate the number of trains assigned to a specific subway line
//not part of Train class since one Train cannot use it
int numTrainsOnLine(char route, Train trains[], int totalTrains)
{
    int totalOnLine = 0;
    for (int i = 0; i<totalTrains; i++)
    {
        if (trains[i].getRoute() == route)
            totalOnLine++;
    }
    return totalOnLine;
}

//part a: main program
int main()
{
    Train NYsubway(5685, 'M'); //from question 4
    const int arrSize = 100;
    //create array
    Train subway[100]={
        Train(1023, 'A'),
        Train(1024, 'B'),
        Train(1025, '1'),
        Train(1026, 'C'),
        Train(1027, '6'),
        Train(1028, 'C'),
        Train(1029, '1'),
        Train(1030, 'C'),
        Train(1031, 'M'),
        Train(1032, 'A')
    };
    //can either use constructor or set statements to populate array with meaningful data


    int totalC = numTrainsOnLine('C', subway, arrSize);
    cout << "There are now " << totalC << " C trains.";

}