// Oldham, Jeffrey D.
// 2000 Feb 21
// CS1321

// Mathematical Vector Use

#include <iostream.h>
#include <stdlib.h>		// has EXIT_SUCCESS
#include "mvector.h"


int main()
{
  cout << "Hello, world.\n";

  MVector m;
  cout << "An empty vector's original size is " << m.size() << ".\n";
  m.resize(3);
  cout << "The vector should now have three elements: " << m.size() << "\n";

  m.set(0, 1.1);
  m.set(1, 2.1);
  m.set(2, 3.1);
  cout << "The vector's contents: " << m << endl;

  MVector n(m);
  cout << "The copied vector's contents should be the same: " << n << endl;

  MVector p(3);
  cout << "A vector declared with size 3 has size " << p.size() <<
    ".\n";
  p.set(0, 4.1);
  p.set(1, 5.1);
  p.set(2, 6.1);
  cout << "The second vector's contents: " << p << endl;

  // test the arithmetic operations
  cout << "addition: " << m + p << endl;
  cout << "subtraction: " << m - p << endl;
  cout << "dot product: " << m * p << endl;
  cout << "scale by 2: " << 2 * m << endl;
  cout << "again: " << m * 2 << endl;
  cout << "add second vector to first, changing first vector: ";
  m += p;
  cout << m << endl;
  cout << "scale first vector, changing it:  ";
  m *= 2;
  cout << m << endl;

  // test the relational operators
  if ((m == m) && !(m != m))
    cout << "A vector equals itself.\n";
  if ((m != p) && !(m == p))
    cout << "Two different vectors are not equal.\n";

  cout << "Goodbye, world.\n";
  return EXIT_SUCCESS;
}