rational.h

这是c++编程方面的名著的例子代码

#include <iostream.h>
#include <eclasses.h>

class rational{
protected:
      long Numerator;
      long Denominator;
      general_exception Exception;
public:
	 rational(long Num = 0,long Den = 1);
	 rational(const rational &X);
	 virtual void assign(long X, long Y);
	 rational operator*(const rational &X);
	 rational operator+(const rational &X);
	 rational &operator=(const rational &X);
	 rational operator-(const rational &X);
	 rational operator/(const rational &X);
         int operator()(const rational &X,const rational &Y) const;
	 int operator==(rational X);
	 long numerator(void) const;
	 long denominator(void) const;
	 friend ostream &operator<<(ostream &out, rational X);
         friend istream &operator>>(istream &in, rational &X);
	 void reduce(void);
};