Listing 7 (rational.h)

#include <stdio.h>

class rational
       {
public:
       rational() { }
       rational(long n, long d) : num(n), denom(d) { }
       rational operator+(rational r);
       rational operator-(rational r);
       rational operator*(rational r);
       rational operator/(rational r);
       rational &operator+=(rational r);
       rational &operator-=(rational r);
       rational &operator*=(rational r);
       rational &operator/=(rational r);
       void put(FILE *);
private:
       long num, denom;
       };

// End of File