開啓3個線程，這3個線程的ID分別爲A、B、C，每個線程將自己的ID在屏幕上，要求輸出結果必須按ABC的順序顯示：ABCABC

第四題（迅雷筆試題）：編寫一個程序，開啓3個線程，這3個線程的ID分別爲A、B、C，每個線程將自己的ID在屏幕上打印10遍，要求輸出結果必須按ABC的順序顯示；如：ABCABC….依次遞推。

#include <stdio.h>   
#include <process.h>   
#include <windows.h>   
#define  g_hThreadEvent(n) g_hThreadEvent##1

unsigned int __stdcall Fun(void *pPM);  
//線程個數
const int THREAD_NUM = 8;  

//循環次數
const int LOOP = 6;

//互斥事件
HANDLE g_hThreadEvent[THREAD_NUM];


int main()
{
	printf("\t子線程循環 10 次，接着主線程循環 100 次，接着又回到子線程循環10 次，\n接着再回到主線程又循環 100 次，如此循環50次\n");

	int i = 0 , j;
	HANDLE hdl[THREAD_NUM];


	for (i = 0; i < THREAD_NUM; i++) 
		g_hThreadEvent[i] = CreateEvent(NULL,FALSE,FALSE,NULL);

	//將線程編號作爲線程參數傳進去，先轉換爲指針，再轉換爲整形，
	for (i = 0; i < THREAD_NUM; i++) 
		hdl[i] = (HANDLE)_beginthreadex(NULL,0,Fun,(void*)i,0,NULL);

	
	SetEvent(g_hThreadEvent[0] );


	WaitForMultipleObjects(THREAD_NUM,hdl,TRUE,INFINITE);

	for (i = 0; i < THREAD_NUM; i++)
	{
		CloseHandle(hdl[i]);
		CloseHandle(g_hThreadEvent[i]);
	}

	return 0;
}

unsigned int __stdcall Fun(void *pPM)
{
	int num = (int)pPM;
	int i = 0;

	for( i  = 0 ; i< LOOP;i++)
	{
		WaitForSingleObject(g_hThreadEvent[num],INFINITE);
		
		//printf("  線程ID=%d,線程編號是%c ,%d \n",GetCurrentThreadId(),num+'A');	 
		 printf(" %c ",num+'A');

		 if(num+1 == THREAD_NUM )
			 printf(" \n");
		
		SetEvent(g_hThreadEvent[(num+1)%THREAD_NUM]);
	}
	return 0;
}