//
// dollar.cpp: implementation of Dollars
//

#include "dollar.h"
#include <cmath>
#include <iostream>
using namespace std;

const int CENTS_PER_DOLLAR = 100;

Dollars::Dollars() : pennies(0) { }

Dollars::Dollars(int d, int p)
  : pennies(d * CENTS_PER_DOLLAR + p)
{ }

Dollars::Dollars(double value)
{
  if ( value >= 0.0 )
    pennies = int(value * CENTS_PER_DOLLAR + 0.5);
  else
    pennies = int(value * CENTS_PER_DOLLAR - 0.5);
}

Dollars& Dollars::operator+=(Dollars other) {
  pennies += other.pennies;
  return *this;
}

Dollars& Dollars::operator-=(Dollars other) {
  pennies -= other.pennies;
  return *this;
}

int Dollars::to_pennies() const
{
  return pennies;
}

int Dollars::dollars() const
{
  return pennies / CENTS_PER_DOLLAR;
}

int Dollars::cents() const
{
  return pennies % CENTS_PER_DOLLAR;
}

void Dollars::print(ostream& out)
{
  out << dollars() << ".";
  if ( abs(cents()) < 10 )
    out << '0';
  out << abs(cents());
}

Dollars operator+(Dollars a, Dollars b) {
  a += b;
  return a;
}

Dollars operator-(Dollars a, Dollars b) {
  a -= b;
  return a;
}