example3_stream_iterators.cpp

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#include <iostream>
#include <iterator>
#include <vector>
#include <algorithm>
#include <sstream>

int main() {
    // Reading from standard input
    std::cout << "Enter numbers (Ctrl+D to end):" << std::endl;
    // Use { } to interprete expression as initializers
    std::vector<int> numbers{std::istream_iterator<int>(std::cin), std::istream_iterator<int>()};

    // Writing to standard output
    std::cout << "You entered: ";
    std::copy(numbers.begin(), numbers.end(), std::ostream_iterator<int>(std::cout, " "));
    std::cout << std::endl;

    // Using stringstream with stream iterators
    std::stringstream ss("10 20 30 40 50");
    // Use { } to interprete expression as initializers
    std::vector<int> more_numbers{std::istream_iterator<int>(ss), std::istream_iterator<int>()};

    std::cout << "Numbers from stringstream: ";
    std::copy(more_numbers.begin(), more_numbers.end(), std::ostream_iterator<int>(std::cout, " "));
    std::cout << std::endl;

    return 0;
}