学步园

/******************************************/<br /> //<br /> //Description: 结构化异常处理 之 终止处理<br /> // Author: gwy<br /> //<br /> /******************************************/<br /> #include <iostream><br /> #include <windows.h><br /> using namespace std;</p> <p>//////////////////////////////////////<br /> //自动进入__finally AbnormalTermination()<br /> //////////////////////////////////////<br /> int Fun()<br /> {<br /> DWORD dwTemp = 0;</p> <p> __try<br /> {<br /> dwTemp = 10;<br /> }<br /> __finally<br /> {<br /> dwTemp = 100;<br /> if(FALSE == AbnormalTermination())<br /> cout<<"自然进入的__finally"<<endl;<br /> }</p> <p> return dwTemp;<br /> }</p> <p>//////////////////////////////////////<br /> //return<br /> //////////////////////////////////////<br /> int Fun1()<br /> {<br /> DWORD dwTemp = 0;</p> <p> __try{<br /> dwTemp = 10;<br /> return dwTemp;<br /> }<br /> __finally<br /> {<br /> dwTemp = 100;<br /> //return dwTemp;<br /> }</p> <p> dwTemp = 1000;<br /> return dwTemp;<br /> }</p> <p>//////////////////////////////////////<br /> //goto AbnormalTermination()<br /> //////////////////////////////////////<br /> int Fun2()<br /> {<br /> DWORD dwTemp = 0;</p> <p> __try{<br /> dwTemp = 10;<br /> goto RtnValue;<br /> }<br /> __finally<br /> {<br /> dwTemp = 100;<br /> if(AbnormalTermination())<br /> cout<<"通过return,goto,continue,break等进入"<<endl;<br /> }</p> <p> dwTemp = 1000;<br /> RtnValue:<br /> return dwTemp;<br /> }</p> <p>//////////////////////////////////////<br /> //continue break<br /> //////////////////////////////////////<br /> int Fun3()<br /> {<br /> DWORD dwTemp = 0;</p> <p> while(dwTemp<10)<br /> {<br /> __try{<br /> if(2 == dwTemp)<br /> continue;</p> <p> if(3 == dwTemp)<br /> break;<br /> }<br /> __finally<br /> {<br /> dwTemp++;<br /> }<br /> }</p> <p> return dwTemp;<br /> }</p> <p>//////////////////////////////////////<br /> //__leave<br /> //////////////////////////////////////<br /> bool Fun4()<br /> {<br /> HANDLE hFile = INVALID_HANDLE_VALUE;<br /> PVOID pvBuf = NULL;</p> <p> bool bFunctionOK = false;</p> <p> __try<br /> {<br /> hFile = CreateFile("test.txt",GENERIC_READ,FILE_SHARE_READ,NULL,OPEN_EXISTING,0,NULL);<br /> if(INVALID_HANDLE_VALUE == hFile)<br /> __leave;</p> <p> pvBuf = VirtualAlloc(NULL,1024,MEM_COMMIT,PAGE_READWRITE);<br /> if(NULL == pvBuf)<br /> __leave;</p> <p> DWORD dwNumBytesRead = 0;<br /> bool fOK = true;<br /> fOK = ReadFile(hFile,pvBuf,1024,&dwNumBytesRead,NULL);<br /> if(!fOK || (0 == dwNumBytesRead))<br /> __leave;</p> <p> cout<<(char*)pvBuf<<endl;</p> <p> bFunctionOK = true;<br /> }<br /> __finally<br /> {<br /> if(NULL != pvBuf)<br /> VirtualFree(pvBuf,1024,MEM_RELEASE|MEM_DECOMMIT);</p> <p> if(INVALID_HANDLE_VALUE != hFile)<br /> CloseHandle(hFile);<br /> }</p> <p> return bFunctionOK;<br /> }</p> <p>//////////////////////////////////////<br /> //main<br /> //////////////////////////////////////<br /> void main(int argc,TCHAR*argv[])<br /> {<br /> cout<<Fun()<<endl<<endl;<br /> cout<<Fun1()<<endl<<endl;<br /> cout<<Fun2()<<endl<<endl;<br /> cout<<Fun3()<<endl<<endl;<br /> if(Fun4())<br /> cout<<"Read success..."<<endl;<br /> else<br /> cout<<"Read fail..."<<endl;<br /> }