#include <windows.h>
#include <iostream>

using namespace std;
int N_value;
long sum = 0;
DWORD WINAPI ThreadFunc(LPVOID lpParameter);
CRITICAL_SECTION cs;

struct CalcParam
{
    int ThreadId;
    int Start;
    int Count;
    CalcParam(int id, int s, int c)
    {
        ThreadId = id;
        Start = s;
        Count = c;
    }
};

void main()
{
    cout << "Please, input N:" << endl;
    //cin >> N_value;
    N_value = 10000;
    InitializeCriticalSection(&cs);
    LPDWORD threadOne = 0,
            threadTwo = 0;

    //int ThreadId1 = 1;
    CalcParam p1(1, 0, N_value / 2);
    CalcParam p2(2, N_value / 2, N_value / 2);

    CreateThread(NULL, 0, &ThreadFunc, &p1, 0, threadOne);
    CreateThread(NULL, 0, &ThreadFunc, &p2, 0, threadTwo);

    cin >> N_value;
    DeleteCriticalSection(&cs);
}
    //long sum1 = 0, sum2 = 0;
DWORD WINAPI ThreadFunc(LPVOID lpParameter)
{
    CalcParam cp = *(CalcParam*)((void*)lpParameter);
    //int threadId = *(int*)((void*)lpParameter);

    for(int i = 0; i < cp.Count; i++)
    {
        EnterCriticalSection(&cs);
        sum += cp.Start + i;
        printf("Thread %i, sum is %ld\n", cp.ThreadId, sum);
        //cout << "Thread " << cp.ThreadId << " sum is " << sum << endl;

        LeaveCriticalSection(&cs);
        Sleep(2);
    }
    return 1;
}