ReducedFraction& ReducedFraction::operator-=(const ReducedFraction& val)
{
reduce();
ReducedFraction value = val;
value.reduce();
const int tmp = lcm(denominator_, val.denominator_);
numerator_ = fractionPart(tmp, numerator_, denominator_)
- fractionPart(tmp, val.numerator_, val.denominator_);
denominator_ = tmp;
return *this;
}
ReducedFraction& ReducedFraction::operator+=(const ReducedFraction& val)
{
preventOverflow();
ReducedFraction value = val;
value.preventOverflow();
const int tmp = lcm(denominator_, val.denominator_);
numerator_ = fractionPart(tmp, numerator_, denominator_)
+ fractionPart(tmp, val.numerator_, val.denominator_);
denominator_ = tmp;
return *this;
}
bool ReducedFraction::operator!=(const ReducedFraction& val) const
{
const int v = lcm(denominator_, val.denominator_);
return fractionPart(v, numerator_, denominator_)
!= fractionPart(v, val.numerator_, val.denominator_);
}