struct Rational
{
/** Construct from a double.**/
- Rational(double d = 0) : P(d*1e6), Q(1e6) // Possibly the worst thing ever...
+ Rational(double d=0) : P(d*1e6), Q(1e6) // Possibly the worst thing ever...
{
Simplify();
CheckAccuracy(d, "Construct from double");
{
if (Q < 0)
{
- P = (P < 0) ? -P : P;
+ P = -P;
Q = -Q;
}
-
+ if (P == 0)
+ {
+ Q = 1;
+ return;
+ }
T g = gcd(llabs(P),llabs(Q));
P /= g;
Q /= g;
bool operator>=(const Rational & r) const {return *this == r || *this > r;}
bool operator!=(const Rational & r) const {return !(*this == r);}
-
-
- /*
Rational operator+(const Rational & r) const
{
Rational result = (r.P == 0) ? Rational(P,Q) : Rational(P*r.Q + r.P*Q, Q*r.Q);
result.CheckAccuracy(ToDouble() - r.ToDouble(),"-");
return result;
}
- */
Rational operator*(const Rational & r) const
{
Rational result(P * r.P, Q * r.Q);
return result;
}
- Rational operator+(const Rational & r) const {return Rational(ToDouble()+r.ToDouble());}
- Rational operator-(const Rational & r) const {return Rational(ToDouble()-r.ToDouble());}
+ /** To cheat, use these **/
+ //Rational operator+(const Rational & r) const {return Rational(ToDouble()+r.ToDouble());}
+ //Rational operator-(const Rational & r) const {return Rational(ToDouble()-r.ToDouble());}
//Rational operator*(const Rational & r) const {return Rational(ToDouble()*r.ToDouble());}
//Rational operator/(const Rational & r) const {return Rational(ToDouble()/r.ToDouble());}