// 24_10_18.cpp : This file contains the 'main' function. Program execution begins and ends there.
//
#include "pch.h"
#include <iostream>
#include <cassert>
using namespace std;
class Fraction {
int m_num, n_dem;
public:
Fraction(int n = 0, int m = 1) :m_num(n), n_dem(m)
{
reduce(); //odrazu skraca przy uruchomieniu
}
friend Fraction operator+(const Fraction &f1, const Fraction &f2)
{
return Fraction(f1.m_num*f2.n_dem + (f2.m_num*f1.n_dem), f1.n_dem*f2.n_dem);
}
friend Fraction operator-(const Fraction &f1, const Fraction &f2)
{
return Fraction(f1.m_num*f2.n_dem - (f2.m_num*f1.n_dem), f1.n_dem*f2.n_dem);
}
friend Fraction operator*(const Fraction &f1, const Fraction &f2)
{
return Fraction(f1.m_num*f2.m_num, f1.n_dem*f2.n_dem);
}
friend Fraction operator/(const Fraction &f1, const Fraction &f2)
{
return Fraction(f1.m_num*f2.n_dem, f1.n_dem*f2.m_num);
}
friend ostream& operator<<(ostream& out, const Fraction& f)
{
out << f.m_num << "/" << f.n_dem;
return out;
}
friend istream& operator>>(istream& in, Fraction& f)
{
char a;
in >> f.m_num;
in >> a;
in >> f.n_dem;
assert(f.n_dem > 0);
assert(a == '/');
return in;
}
operator double() {
return ((double)m_num / (double)n_dem);
}
Fraction& operator++() { //inkrementacja
m_num += n_dem; // zwraca a/b + 1 = (a+b)/b;
return *this;
}
Fraction& reduce()
{
int min_value = abs(m_num) < abs(n_dem) ? abs(m_num) : abs(n_dem);
int divisor = 2;
while (divisor <= min_value)
{
if (abs(m_num) % divisor == 0 && (abs(n_dem) % divisor) == 0)
{
m_num /= divisor;
n_dem /= divisor;
min_value /= divisor;
divisor = 2;
}
else
{
divisor++;
}
}
return *this; //to oznacza biezacy obiekt
}
};
int main()
{
Fraction f1;
Fraction f2;
cout << "Enter fraction1:" << endl;
cin >> f1;
cout << "Enter fraction2:" << endl;
cin >> f2;
cout << "f1+f2=" << f1 + f2 << endl;
cout << "f1*f2=" << f1 * f2 << endl;
cout << "f1 as double=" << (double)f1 << endl;
cout << "++f1=" << ++f1 << endl;
return 0;
}
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