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