Fix compiling with Arbint/Gmpint rationals

[ipdf/code.git] / src / rational.h

diff --git a/src/rational.h b/src/rational.h
index 595f5f2..bbd4c30 100644 (file)
--- a/src/rational.h
+++ b/src/rational.h
@@ -162,7 +162,7 @@ struct Rational
        //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(*this); r.P = -r.P;}
+       Rational operator-() const {Rational r(*this); r.P = -r.P; return r;}
        Rational & operator=(const Rational & r) {P = r.P; Q = r.Q; Simplify(); return *this;}
        Rational & operator+=(const Rational & r) {this->operator=(*this+r); return *this;}
        Rational & operator-=(const Rational & r) {this->operator=(*this-r); return *this;}