#include"Fraction.h"
void Fraction::reduce()
{
	//分子小于分母
	if (this->m_fz < this->m_fm)
	{
		for (int i = this->m_fz; i >= 1; i--)
		{
			if ((this->m_fz % i == 0) && (this->m_fm % i == 0))
			{
				this->m_fz /= i;
				this->m_fm /= i;
			}
		}
	}
	//分子大于等于分母
	else
	{
		for (int i = this->m_fm; i >= 1; i--)
		{
			if ((this->m_fz % i == 0) && (this->m_fm % i == 0))
			{
				this->m_fz /= i;
				this->m_fm /= i;
			}
		}
	}
}


ostream& operator<< (ostream& cout, Fraction f)
{
	cout << f.m_fz << "/" << f.m_fm;
	return cout;
}
istream& operator>>(istream& cin, Fraction &f)// Q1:？？？这里为啥加引用才能过去
{
	cin >> f.m_fz >> f.m_fm;
	return cin;
}
Fraction ::Fraction(int fz,int fm)
{
	while (1)
	{
		if (fm != 0)
		{
			break;
		}
		else
		{
			cout << "输入有误，请重新输入分子和分母" << endl;
			cin >> fz >> fm;
		}
	}
	this->m_fz = fz;
	this->m_fm = fm;
}
Fraction Fraction::operator+(Fraction&f2)
{
	static Fraction f3(0, 1);
	f3.m_fz = this->m_fm * f2.m_fz + f2.m_fm * this->m_fz;
	f3.m_fm = this->m_fm * f2.m_fm;
	return f3;
}
Fraction Fraction::operator-(Fraction& f2)
{
	static Fraction f3(0, 1);
	f3.m_fz = this->m_fm * f2.m_fz - f2.m_fm * this->m_fz;
	f3.m_fm = this->m_fm * f2.m_fm;
	return f3;
}
Fraction Fraction::operator*(Fraction& f2)
{
	static Fraction f3(0, 1);
	f3.m_fz = this->m_fz * f2.m_fz;
	f3.m_fm = this->m_fm * f2.m_fm;
	return f3;
}
Fraction Fraction::operator/(Fraction& f2)
{
	static Fraction f3(0, 1);
	f3.m_fz = this->m_fz * f2.m_fm;
	f3.m_fm = this->m_fm * f2.m_fz;
	return f3;
}

//前置++
Fraction& Fraction::operator++()
{
	this->m_fz = this->m_fz + this->m_fm;
	return *this; //返回自身，返回类型是  类& 否则会在返回时创建一个新对象
}
//后置++
Fraction Fraction::operator++(int)
{
	 Fraction temp = *this;
	this->m_fz = this->m_fz + this->m_fm;
	return temp;
}
//后置--
Fraction Fraction::operator--(int)
{
	Fraction temp = *this;
	this->m_fz = this->m_fz - this->m_fm;
	return temp;
}
//<
bool Fraction::operator<(Fraction& f2)
{
	this->m_fz = this->m_fz * f2.m_fm;
	f2.m_fz = f2.m_fz * this->m_fm;
	if (this->m_fz < f2.m_fz)
	{
		return true;
	}
	else
	{
		return false;
	}
}

//>
bool Fraction::operator>(Fraction& f2)
{
	this->m_fz = this->m_fz * f2.m_fm;
	f2.m_fz = f2.m_fz * this->m_fm;
	if (this->m_fz > f2.m_fz)
	{
		return true;
	}
	else
	{
		return false;
	}
}

//  ==
bool Fraction::operator==(Fraction& f2)
{
	this->m_fz = this->m_fz * f2.m_fm;
	f2.m_fz = f2.m_fz * this->m_fm;
	if (this->m_fz == f2.m_fz)
	{
		return true;
	}
	else
	{
		return false;
	}
}

//!=
bool Fraction::operator!=(Fraction& f2)
{
	this->m_fz = this->m_fz * f2.m_fm;
	f2.m_fz = f2.m_fz * this->m_fm;
	if (this->m_fz != f2.m_fz)
	{
		return true;
	}
	else
	{
		return false;
	}
}
void Fraction::display()
{
	cout << this->m_fz << "/" << this->m_fm << endl;
}