新浪技术面试题

用两个线程实现1-100之间数的输出

主要关键是实现线程的同步访问，程序用到了事件对象和CreateThread函数。

#include <stdio.h>

#include <windows.h>



int n=0;

HANDLE hEvent;



DWORD WINAPI ThreadFunc(LPVOID lpParam)

{

	WaitForSingleObject(hEvent,INFINITE);//实现互斥访问

	while(n<100)

	{

		Sleep(100);

		n++;

		printf("the count=%d\n",n);

	}

	SetEvent(hEvent);



}



DWORD WINAPI Add(LPVOID lpParam)

{

	WaitForSingleObject(hEvent,INFINITE);

	while(n<100)

	{

		Sleep(100);

		n++;

		printf("the count=%d\n",n);

	}

	SetEvent(hEvent);



}



int main()

{

	HANDLE hThread,hThread1;

	DWORD dwThreadId,dwThreadId1;



	hEvent=CreateEvent(NULL,FALSE,TRUE,NULL);//创建事件对象

	hThread=CreateThread(NULL,NULL,ThreadFunc,NULL,0,&dwThreadId);//创建线程

	hThread1=CreateThread(NULL,NULL,Add,NULL,0,&dwThreadId1);



	printf("the dwThreadId =%d\n",dwThreadId);

	printf("the dwThreadId =%d\n",dwThreadId1);



	WaitForSingleObject(hThread,INFINITE);

	WaitForSingleObject(hThread1,INFINITE);



	CloseHandle(hThread);//关闭线程句柄

	CloseHandle(hThread1);

	return 0;

}