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FractionTask/fraction.cpp

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#include "fraction.hpp"
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namespace FractionNS {
int gcd(int p, int q) {
while(true) {
if(p == 0) return q;
q %= p;
if(q == 0) return p;
p %= q;
}
}
int lcm(int p, int q) {
int gcd = FractionNS::gcd(p, q);
return gcd != 0 ? (p / gcd * q) : 0;
}
int abs(int n) {
if(n < 0) return -n;
return n;
}
Fraction::Fraction(int numerator, int denominator)
{
auto gcd = FractionNS::gcd(FractionNS::abs(numerator), FractionNS::abs(denominator));
if(denominator < 0) {
numerator *= -1;
denominator *= -1;
}
this->m_numerator = numerator / gcd;
this->m_denominator = denominator / gcd;
}
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Fraction::Fraction(int n) {
this->m_numerator = n;
this->m_denominator = 1;
}
Fraction::Fraction(float n) {
// TODO
throw std::runtime_error("Not yet implemented");
}
Fraction::Fraction(const Fraction& n) {
this->m_numerator = n.getNumerator();
this->m_denominator = n.getDenominator();
}
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int Fraction::getNumerator() const { return m_numerator; }
int Fraction::getDenominator() const { return m_denominator; }
void Fraction::setNumerator(int numerator) {
auto gcd = std::__gcd(numerator, this->m_denominator);
this->m_numerator = numerator / gcd;
}
void Fraction::setDenominator(int denominator) {
auto gcd = std::__gcd(this->m_numerator, denominator);
this->m_denominator = denominator / gcd;
}
QString Fraction::display() const {
return QString::number(m_numerator) + '/' + QString::number(m_denominator);
}
bool Fraction::operator==(const int n) const {
return (double(m_numerator) / double(m_denominator)) == n;
}
bool Fraction::operator==(const float n) const {
return (double(m_numerator) / double(m_denominator)) == n;
}
bool Fraction::operator==(const double n) const {
return (double(m_numerator) / double(m_denominator)) == n;
}
bool Fraction::operator==(const Fraction& n) const {
return (this->m_numerator == n.getNumerator())
&& (this->m_denominator == n.getDenominator());
}
bool Fraction::operator!=(const int n) const {
return (double(m_numerator) / double(m_denominator)) != n;
}
bool Fraction::operator!=(const float n) const {
return (double(m_numerator) / double(m_denominator)) != n;
}
bool Fraction::operator!=(const double n) const {
return (double(m_numerator) / double(m_denominator)) != n;
}
bool Fraction::operator!=(const Fraction& n) const {
return (this->m_numerator != n.getNumerator())
|| (this->m_denominator != n.getDenominator());
}
Fraction& Fraction::operator+(const int n) const {
return Fraction(n) + *this;
}
Fraction& Fraction::operator+(const float n) const {
return Fraction(n) + *this;
}
Fraction& Fraction::operator+(const double n) const {
return Fraction(n) + *this;
}
Fraction& Fraction::operator+(const Fraction& other) const {
auto lcm = FractionNS::lcm(getDenominator(), other.getDenominator());
return *new Fraction((getNumerator() + other.getNumerator()) * lcm, getDenominator() * lcm);
}
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}