迅雷笔试题-白红宇

迅雷笔试题

阅读量：5074 次

发布时间：2019-06-12

本文共 1619 字，大约阅读时间需要 5 分钟。

　　编写一个程序，开启3个线程，这3个线程的ID分别为A、B、C，每个线程将自己的ID在屏幕上打印10遍，要求输出结果必须按ABC的顺序显示；如：ABCABC….依次递推。

#include 
     
      #include 
      
       #include 
       
          #include 
        
           #include 
         
            #include 
          
            #include 
           
             using namespace std; HANDLE hEventA;HANDLE hEventB;HANDLE hEventC;HANDLE hThreadA;HANDLE hThreadB;HANDLE hThreadC;UINT __stdcall ThreadA(LPVOID lparam){ int n = 10; while(n--) { WaitForSingleObject(hEventA, INFINITE); printf("A"); ResetEvent(hEventA); SetEvent(hEventB); } return 1;}UINT __stdcall ThreadB(LPVOID lparam){ int n = 10; while(n--) { WaitForSingleObject(hEventB, INFINITE); printf("B"); ResetEvent(hEventB); SetEvent(hEventC); } return 1;}UINT __stdcall ThreadC(LPVOID lparam){ int n = 10; while(n--) { WaitForSingleObject(hEventC, INFINITE); printf("C\n"); ResetEvent(hEventC); SetEvent(hEventA); } return 1;}int main() { hEventA = CreateEvent(NULL, TRUE, FALSE, NULL); hEventB = CreateEvent(NULL, TRUE, FALSE, NULL); hEventC = CreateEvent(NULL, TRUE, FALSE, NULL); SetEvent(hEventA); hThreadA = (HANDLE)_beginthreadex(NULL, 0, ThreadA, NULL, 0, NULL); hThreadB = (HANDLE)_beginthreadex(NULL, 0, ThreadB, NULL, 0, NULL); hThreadC = (HANDLE)_beginthreadex(NULL, 0, ThreadC, NULL, 0, NULL); WaitForSingleObject(hThreadA, INFINITE); WaitForSingleObject(hThreadB, INFINITE); WaitForSingleObject(hThreadC, INFINITE); CloseHandle(hThreadA); CloseHandle(hThreadB); CloseHandle(hThreadC); CloseHandle(hEventA); CloseHandle(hEventB); CloseHandle(hEventC); return 0; }