single model

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#include <iostream>#include <windows.h>using namespace std;class Single{public:static Single & GetInstance() {static Single _obj;return _obj;}void Print(){cout << "hello world : " << endl;}protected:Single(){}~Single(){}};class Single1{public:static Single1 * GetInstance() {if (NULL == m_pSingle){nCount++;m_pSingle = new Single1;}return m_pSingle;}void Print(){cout << "Single1: hello world : " << nCount << endl;}protected:Single1() {}~Single1(){}private:static Single1* m_pSingle;static int nCount;};class Single1 * Single1::m_pSingle = NULL;int Single1::nCount = 0;void WorkThread(void *pParam){Sleep(rand()%100);Single::GetInstance().Print();}void WorkThread1(void *pParam){Sleep(rand()%100);Single1::GetInstance()->Print();}int main(int argc, char *argv[]){Single::GetInstance().Print();::CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)WorkThread, NULL, 0, 0);::CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)WorkThread, NULL, 0, 0);::CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)WorkThread, NULL, 0, 0);::CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)WorkThread1, NULL, 0, 0);::CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)WorkThread1, NULL, 0, 0);::CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)WorkThread1, NULL, 0, 0);getchar();}
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