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// Money.h
#ifndef MONEY_H
#define MONEY_H
#include <string>
#include <stdexcept>
#include <cppunit/portability/Stream.h> // or <iostream> if portability is not an issue
class IncompatibleMoneyError : public std::runtime_error
{
public:
IncompatibleMoneyError() : std::runtime_error( "Incompatible moneys" )
{
}
};
class Money
{
public:
Money( double amount, std::string currency )
: m_amount( amount )
, m_currency( currency )
{
}
double getAmount() const
{
return m_amount;
}
std::string getCurrency() const
{
return m_currency;
}
bool operator ==( const Money &other ) const
{
return m_amount == other.m_amount &&
m_currency == other.m_currency;
}
bool operator !=( const Money &other ) const
{
return !(*this == other);
}
Money &operator +=( const Money &other )
{
if ( m_currency != other.m_currency )
throw IncompatibleMoneyError();
m_amount += other.m_amount;
return *this;
}
private:
double m_amount;
std::string m_currency;
};
// The function below could be prototyped as:
// inline std::ostream &operator <<( std::ostream &os, const Money &value )
// If you know that you will never compile on a platform without std::ostream
// (such as embedded vc++ 4.0; though even that platform you can use STLPort)
inline CPPUNIT_NS::OStream &operator <<( CPPUNIT_NS::OStream &os, const Money &value )
{
return os << "Money< value =" << value.getAmount() << "; currency = " << value.getCurrency() << ">";
}
#endif
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