The following code example is taken from the book
Object-Oriented Programming in C++
by Nicolai M. Josuttis, Wiley, 2002
© Copyright Nicolai M. Josuttis 2002
#ifndef FRACTION_HPP
#define FRACTION_HPP
// include standard header files
#include <iostream>
// **** BEGIN namespace CPPBook ********************************
namespace CPPBook {
class Fraction {
private:
int numer;
int denom;
public:
/* default constructor, and one- and two-parameter constructor
*/
Fraction(int = 0, int = 1);
// output (defined inline)
void print() const {
std::cout << numer << '/' << denom << std::endl;
}
// multiplication
Fraction operator * (const Fraction&) const;
// multiplicative assignment
const Fraction& operator *= (const Fraction&);
// comparison
bool operator < (const Fraction&) const;
};
/* operator *
* - defined inline
*/
inline Fraction Fraction::operator * (const Fraction& f) const
{
/* simply multiply numerator and denominator
* - no reducing yet
*/
return Fraction(numer * f.numer, denom * f.denom);
}
} // **** END namespace CPPBook ********************************
#endif // FRACTION_HPP