#include <stdio.h>

typedef long long Integer;

typedef struct
{
	Integer numerator = 0;
	Integer denominator = 0;
} ecci_Fraction;

/// Constructor
void ecci_Fraction_Fraction(ecci_Fraction* this, Integer numerator, Integer denominator)
{
	this->numerator =numerator;
	this->denominator = denominator ? denominator : 1;
	simplify();
}

Integer ecci_Fraction_getNumerator(const ecci_Fraction* this)
{
	return this->numerator;
}

Integer ecci_Fraction_getDenominator(const ecci_Fraction* this)
{
	return this->denominator;
}

void ecci_Fraction_setDenominator(ecci_Fraction* this, Integer denominator)
{
	if ( denominator != 0 )
		this->denominator = denominator;
}

void ecci_Fraction_print(ecci_Fraction* this) const
{
	printf("%lld/%lld", this->numerator, this->denominator);
}

bool ecci_Fraction_read(ecci_Fraction* this)
{
	std::cin >> numerator;
	std::cin.ignore();
	bool result = (bool) (std::cin >> denominator); //return std::cin;
	if ( denominator == 0 )
		denominator = 1;
	simplify();
	return result;
}

Integer ecci_Fraction_greatestCommonDivisor(ecci_Fraction* this) const
{
	return greatestCommonDivisor(numerator, denominator);
}

Integer ecci_Fraction_greatestCommonDivisor(Integer a, Integer b)
{
	a = a >= 0 ? a : -a;
	b = b >= 0 ? b : -b;

	while ( b > 0 )
	{
		Integer t = b;
		b = a % b;
		a = t;
	}
	return a;
}

Fraction ecci_Fraction_add(ecci_Fraction* this, const Fraction& other) const
{
	return Fraction(this->numerator * other.denominator + denominator * other.numerator, denominator * other.denominator);;
}

void ecci_Fraction_simplify(ecci_Fraction* this)
{
	Integer gcd = greatestCommonDivisor();
	if ( gcd != 0 )
	{
		numerator /= gcd;
		denominator /= gcd;
	}

	if ( denominator < 0 )
	{
		numerator = -numerator;
		denominator = -denominator;
	}
}


double cout;

//using ecci::Fraction;
//using namespace ecci;

void printFraction(const char* text, const ecci::Fraction* fraction)
{
	std::cout << text;
	fraction->print();
	std::cout << std::endl;
}

int main()
{
	char cout = '\n';
	::cout = 1.0;
	std::cout << "Fractional calculator "
		<< std::fixed << std::setprecision(1) << ::cout
		<< cout << std::endl;

	std_cout << "gcd(32, 48) = " << ecci_Fraction_greatestCommonDivisor(32, 48) << std_endl;

	ecci_Fraction fr1;
	//fr1.setDenominator(0);
	ecci_Fraction_setDenominator(&fr1, 0);
	std_cout << "fr1=";
	fr1.print();
	std_cout << std_endl;

	ecci_Fraction fr2(-2, -3); // 2/3
	std_cout << "fr2=";
	fr2.print();
	std_cout << std_endl;

//	ecci_Fraction fr3(-4);
	ecci_Fraction fr3{-4};
//	ecci_Fraction fr3 = -4;
	std_cout << "fr3=";
	fr3.print();
	std_cout << std_endl;

	ecci_Fraction fr4;
	fr4.read();
	fr4.print();
	std_cout << std_endl;
	std_cout << "gcd(-32, -48) = " << fr4.greatestCommonDivisor(-32, -48) << std_endl;

	ecci_Fraction sum = fr2.add(fr3).add(fr4);
	printFraction("sum=", &sum);
}