sort-TXT-CPP2

#include <iostream>
#include <fstream>
#include <vector>
#include <algorithm>
#include <chrono>

void sort_file(const std::string& input_path, const std::string& output_path) {
    std::ifstream input_file(input_path);
    std::ofstream output_file(output_path);
    std::vector<char> contents((std::istreambuf_iterator<char>(input_file)),
                               std::istreambuf_iterator<char>());

    auto partition_point = std::partition(contents.begin(), contents.end(), [](char c) { return c != ' '; });
    std::sort(contents.begin(), partition_point);

    std::copy(contents.begin(), contents.end(), std::ostreambuf_iterator<char>(output_file));
}

int main() {
    auto start = std::chrono::high_resolution_clock::now();
    sort_file("input.txt", "output.txt");
    auto stop = std::chrono::high_resolution_clock::now();
    std::chrono::duration<double> elapsed = stop - start;
    std::cout << "RunTime: " << elapsed.count() << std::endl;
    return 0;
}