How do i assign values to my fraction objecct using make_unique()? - c++11

Question

#include <memory> // for std::unique_ptr and std::make_unique
#include <iostream>
class Fraction
{
private:
int m_numerator;
int m_denominator;
public:
Fraction(int numerator, int denominator) :
m_numerator{ numerator }, m_denominator{ denominator }
{
}
friend std::ostream& operator<<(std::ostream& out, const Fraction &f1)
{
out << f1.m_numerator << "/" << f1.m_denominator;
return out;
}
friend operator=(const Fraction &f1,const int numerator,const int denominator){
f1.m_numerator=numerator;
f1.m_denominator=denominator;
}
};
int main()
{
// Create a single dynamically allocated Fraction with numerator 3 and denominator 5
std::unique_ptr<Fraction> f1{ std::make_unique<Fraction>(3, 5) };
std::cout << *f1 << '\n';
// Create a dynamically allocated array of Fractions of length 4
// We can also use automatic type deduction to good effect here
auto f2{ std::make_unique<Fraction[]>(4) };
f2[0]=(3,5);
f2[1]=(67,82,5,543345);
std::cout << f2[0] << '\n';
std::cout << f2[1] << '\n';
return 0;
}

Answer 1

First, operator= can be implemented only as member function, not free function. So your approach is just wrong. Second, overloaded operator= can accept only one parameter. The closest thing you want, can be achived by passing initializer_list as this parameter:
Fraction& operator=(std::initializer_list<int> il){
// some code validating size of il here
this->m_numerator=*il.begin();
this->m_denominator = *(il.begin()+1);
return *this;
}
the use looks like:
f2[0]={3,5};
f2[1]={67,84};
Full demo