plik *.h nie chce się dodać jako załącznik, więc wklejam wszystko tutaj:
// main.cpp
#include <iostream>
#include "frac.h"
int main(int argc, char** argv)
{
frac frac1, frac2;
std::cin >> frac1 >> frac2;
std::cout << frac1 + frac2 << std::endl;
system("pause");
return 0;
}
//--------------------
// frac.h
#pragma once
#include <iostream>
class frac
{
int nominator;
int denominator;
void normalise();
int lcm(int, int);
int gcd(int, int);
public:
frac();
frac(int, int);
friend std::ostream& operator<<(std::ostream&, const frac&);
friend std::istream& operator>> (std::istream&, frac&);
frac operator+(frac const&);
};
//--------------------
//frac.cpp
#include "frac.h"
using namespace std;
void frac::normalise()
{
int div = gcd(nominator, denominator);
nominator /= div;
denominator /= div;
}
int frac::lcm(int a, int b)
{
return (abs(a) / gcd(a, b)) * abs(b);
}
int frac::gcd(int a, int b)
{
int t;
while (0 != b)
{
t = b;
b = a % b;
a = t;
}
return a;
}
frac::frac() : nominator(0), denominator(1)
{}
frac::frac(int nominator, int denominator)
{
if (0 == denominator)
throw new invalid_argument("denominator must be non zero");
this->nominator = nominator;
this->denominator = denominator;
normalise();
}
ostream& operator<<(ostream& out, const frac& fr)
{
out << fr.nominator;
if (1 != fr.denominator) out << '/' << fr.denominator;
return out;
}
istream& operator>> (istream& in, frac& fr)
{
int n, d;
in >> n >> d;
if (0 == d)
throw new invalid_argument("denominator must be non zero");
fr.nominator = n;
fr.denominator = d;
fr.normalise();
return in;
}
frac frac::operator+(frac const& fr)
{
frac sum;
int l = lcm(denominator, fr.denominator);
int mlt1 = l / denominator;
int mlt2 = l / fr.denominator;
sum.denominator = l;
sum.nominator = nominator * mlt1 + fr.nominator * mlt2;
sum.normalise();
return sum;
}
