// implement the Matrix class
#include <iostream>
using std::cout;

#include "Matrix.h"

Matrix::Matrix(double a, double b, double c, double d):
  a_(a),
  b_(b),
  c_(c),
  d_(d)
{
  //default constrctor
}

Matrix::Matrix(const Matrix& m):
  a_(m.a_),
  b_(m.b_),
  c_(m.c_),
  d_(m.d_)
{
  //copy constructor
}

double Matrix::det() {
  return a_*d_ - b_*c_;
}
bool Matrix::isSingular() {
  if(det() == 0 )
    return false;
  else
    return true;
}

Matrix Matrix::inverse()
{
  double k = 1/det();
  Matrix temp(k*d_,-k*b_,-k*c_,k*a_);
  return temp;
}

void Matrix::print()
{
  cout << a_ << " " << b_ << '\n' << c_ << " " << d_ << "\n";
}