这是道面试题目：有三个线程分别打印A、B、C,请用多线程编程实现，在屏幕上循环打印10次ABCABC…
见代码：
1 #include <iostream> 2 #include <Windows.h> 3 4 using namespace std; 5 6 HANDLE hMutex; 7 int counts = 0; 8 int flag = 3; 9 10 void t1(); 11 void t2(); 12 void t3(); 13 14 int main() { 15 HANDLE hThread = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)t1, NULL, 0, NULL); 16 hThread = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)t2, NULL, 0, NULL); 17 hThread = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)t3, NULL, 0, NULL); 18 hMutex = CreateMutex(NULL, FALSE, L"lvhuan"); 19 CloseHandle(hThread); 20 while(counts<30){ 21 Sleep(1000); 22 } 23 return 0; 24 } 25 void t1() { 26 while (counts < 30) { 27 WaitForSingleObject(hMutex, INFINITE); 28 if (flag == 3) { 29 flag = 1; 30 cout << 'A' << endl; 31 counts++; 32 } 33 ReleaseMutex(hMutex); 34 } 35 } 36 void t2() { 37 while (counts < 30) { 38 WaitForSingleObject(hMutex, INFINITE); 39 if (flag == 1) { 40 flag = 2; 41 cout << 'B' << endl; 42 counts++; 43 } 44 ReleaseMutex(hMutex); 45 } 46 } 47 void t3() { 48 while (counts < 30) { 49 WaitForSingleObject(hMutex, INFINITE); 50 if (flag == 2) { 51 flag = 3; 52 cout << 'C' << endl; 53 counts++; 54 } 55 ReleaseMutex(hMutex); 56 } 57 }
这里给个java版本的链接：http://mouselearnjava.iteye.com/blog/1949228?utm_source=tuicool&utm_medium=referral