CriticalSection_2

#include <Windows.h>#include <iostream>using namespace std;int index = 0;CRITICAL_SECTION g_cs;void add1() { cout << index++ << endl; }void add2() { cout << index++ << endl; }void add3() { cout << index++ << endl; }DWORD WINAPI ThreadFunc1(LPVOID lpParam){    EnterCriticalSection(&g_cs);    add1();    add2();    add3();    LeaveCriticalSection(&g_cs);    return 0;}DWORD WINAPI ThreadFunc2(LPVOID lpParam){    EnterCriticalSection(&g_cs);    add1();    add2();    add3();    LeaveCriticalSection(&g_cs);    return 0;}int main(){    InitializeCriticalSection(&g_cs);    HANDLE hThread1, hThread2;    hThread1 = CreateThread(NULL, 0, ThreadFunc1, NULL, 0, NULL);    hThread2 = CreateThread(NULL, 0, ThreadFunc2, NULL, 0, NULL);    /*cout << "input a number:";    int k;    cin >> k;1    cout << "hello World." << endl;*/    system("pause");    return 0;}