vektor_sum_niti

#include <iostream>
#include <thread>
#include <vector>
#include <future>
using namespace std;

typedef vector<double>::const_iterator vci;

double s(vci begin, vci end) {
        double sum_async=0;
        for(; begin!=end; ++begin) {
        sum_async+= *begin;
        }
        return sum_async;
}


int main()
{
    double sum=0;
    double sum_async=0;

    int n=10;
    vector<double>v ={1,2,3,4,5,6,7,8,9,10};

    for(int i=0; i<v.size()/2; ++i) {
    sum+=v[i];
    }

    for(int i=0; i<v.size()/2; ++i) {
    auto x = async(s, v.begin()+v.size()/2, v.end());
    sum_async = x.get();
    }

    sum+=sum_async;
    cout<<sum<<endl;
    return 0;
}