int g_test; int temp; BOOL g_bRunning; DWORD WINAPI thWriteProc1(LPVOID lParam) { while(g_bRunning) { g_test = 12345678; Sleep(1); } return 0; } DWORD WINAPI thWriteProc2(LPVOID lParam) { while(g_bRunning) { g_test = 13579246; Sleep(1); } return 0; } DWORD WINAPI thReadProc(LPVOID lParam) { while(g_bRunning) { temp = g_test;//讀取值 if ( temp != 12345678 && temp != 13579246 ) { g_bRunning = FALSE; CString str; str.Format("read error!%d", temp); AfxMessageBox(str); break; } Sleep(1); } return 0; } void CTestMultiyAccessIntDlg::OnButton1() { g_bRunning = TRUE; for ( int i = 0; i < 50; i++ ) { //建立50個寫執行緒1 CreateThread( NULL, 0, thWriteProc1, NULL, 0, NULL ); } for ( int i = 0; i < 50; i++ ) { //建立50個寫執行緒2 CreateThread( NULL, 0, thWriteProc2, NULL, 0, NULL ); } for ( int i = 0; i < 50; i++ ) { //建立50個讀執行緒 CreateThread( NULL, 0, thReadProc, NULL, 0, NULL ); } }