C++: std::istream_iterator example (https://stackoverflow.com/a/51889159/7670262)

istream_iterator_example.cpp

// https://stackoverflow.com/a/51889159/7670262

#include <iterator>
#include <iostream>

struct data
{
    data() = default;
    int num1 = 0;
    int num2 = 0;

    friend std::istream& operator>>( std::istream& is, data& d )
    {
        is >> d.num1 >> d.num2;
        return is;
    }

    friend std::ostream& operator<<( std::ostream& os, const data& d )
    {
        os << "[" << d.num1 << ", " << d.num2 << "]";
        return os;
    }
};

int main()
{
    std::istream_iterator<data> din(std::cin);
    data daData = *din;

    std::cout << daData;

    return 0;
}

/*
    INPUT:
    1 2

    OUTPUT:
    [1, 2]
*/