// Project Vector
// File main.cpp

#include <iostream>
using namespace std;

#include "vector.h"

// Vector with zero size.
Vector::Vector()
{
    size = 0;
    array = NULL;
}

// Vector of size n set to zeros.
Vector::Vector(int n)
{
    size = n;
    array = new int[size];
    for(int i = 0; i <= size-1; i++)
        array[i] = 0;
}

// Vector or size n initialized from array.
Vector::Vector(int n, int a[])
{
    size = n;
    array = new int[size];
    for(int i = 0; i <= size-1; i++)
        array[i] = a[i];
}

// Copy constructor.
Vector::Vector(Vector &v)
{
    size = v.size;
    array = new int[size];
    for(int i = 0; i <= size-1; i++)
        array[i] = v.array[i];
}

// Destructor.
Vector::~Vector()
{
    delete[] array;
}

// Print vector.
void Vector::print()
{
    cout << "(";
    if (size == 0)
    {
        cout << " )" << endl;
        return;
    }

    for(int i = 0; i <= size-2; i++)
        cout << array[i] << ",";
    cout << array[size-1] << ")" << endl;
}

// Overloaded assignment operator.
void Vector::operator=(Vector &v)
{   
    // Don't copy vector to itself.
    if (this == &v)
        return;

    size = v.size;
    array = new int[size];
    for(int i = 0; i <= size - 1; i++)
        array[i] = v.array[i];
}

// Overloaded addition operator.
Vector Vector::operator+(Vector &v)
{
    Vector w;
    if (size == v.size)
    {
        w.size = size;
        w.array = new int[size];
        for(int i = 0; i <= size - 1; i++)
            w.array[i] = array[i] + v.array[i];
    }
    return w;
}

// Overloaded file output operator.
ostream& operator<<(ostream &out, Vector &v)
{
    v.print();
    return out;
}