KP___2

#include <iostream>
#include <time.h>
#include <thread>

using namespace std;

void countSum(int * mas, int c, int * sum, int k);


int main()
{
    srand(time(0));
    int n=100000, k=0;
   // cout << "Enter n: ";
    int sum1=0;
    int sum2=0;
    int sum3=0;
    int sum4=0;
    //int sum1=0
   // int s
    //cin >> n;
    int mas[n];
    int t=0;
    cout << "Enter " << n << " numbers: ";
    for (int i=0; i<n; i++){
        //cin >> t;
        mas[i]=rand()%125;
    }
    for(int j=0; j< 1000; j++){
    t=n/4;
    k=0;
    thread thr1(countSum, &mas[0], t, &sum1, k);
    k=n/4;
    thread thr2(countSum, &mas[0], t, &sum2, k);
    k=n/2;
    thread thr3(countSum, &mas[0], t, &sum3, k);
    k=3*n/4;
    t=n/4 + n%4-1;
    countSum(&mas[0], t, &sum4, k);

    thr1.join();
    thr2.join();
    thr3.join();
    //thr4.join();
    sum1 += (sum2+sum3+sum4);
   // cout << "Sum = " << sum1;
    }
    return 0;
}


void countSum(int * mas, int c, int * sum, int k){
    for (int i=k; i<(k+c); i++){
        if (i%2==0){
            *sum -= mas[i];
        }else{
            *sum += mas[i];
        }
    }
}