为啥我在VC2008.Release下反汇编switch代码，会跳出2个_main的入口函数？

2009-09-14 11:50:18 256 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

安信可 VC-02 离线语音模组二次开发：基于 SDK 自定义 10 条指令实战本文详细介绍了安信可 VC-02 离线语音模组的二次开发流程，基于 SDK 实现 10 条自定义指令的实战操作。从开发环境搭建、指令配置、代码修改到固件编译烧录，提供完整的离线语音识别解决方案，助力智能家居设备实现本地化语音控制。阅读详情



int _tmain(int argc, _TCHAR* argv[])

{

00401000  push        ebp  

00401001  mov         ebp,esp 

00401003  and         esp,0FFFFFFF8h 

	int i;





	cin>>i;

00401006  mov         ecx,dword ptr [__imp_std::cin (402044h)] 

0040100C  sub         esp,8 

0040100F  lea         eax,[esp+4] 

00401013  push        eax  

00401014  call        dword ptr [__imp_std::basic_istream<char,std::char_traits<char> >::operator>> (402064h)] 

	switch (i)

0040101A  mov         eax,dword ptr [esp+4] 

0040101E  sub         eax,1 

00401021  je          wmain+58h (401058h) 

00401023  sub         eax,1 

00401026  je          wmain+43h (401043h) 

00401028  sub         eax,8 

0040102B  jne         wmain+7Bh (40107Bh) 



int _tmain(int argc, _TCHAR* argv[])

{

	int i;





	cin>>i;

	switch (i)

	{

	case 1:

		cout<<"1"<<endl;

		break;

	case 2:

		cout<<"2"<<endl;

		break;

	case 10:

		cout<<"10"<<endl;

0040102D  mov         ecx,dword ptr [__imp_std::endl (402038h)] 

00401033  mov         edx,dword ptr [__imp_std::cout (402048h)] 

00401039  push        ecx  

0040103A  push        ecx  

0040103B  push        offset string "10" (40213Ch) 

00401040  push        edx  

		break;

00401041  jmp         wmain+6Bh (40106Bh) 

private:



};



int _tmain(int argc, _TCHAR* argv[])

{

	int i;





	cin>>i;

	switch (i)

	{

	case 1:

		cout<<"1"<<endl;

		break;

	case 2:

		cout<<"2"<<endl;

00401043  mov         eax,dword ptr [__imp_std::endl (402038h)] 

00401048  push        eax  

00401049  push        ecx  

0040104A  mov         ecx,dword ptr [__imp_std::cout (402048h)] 

00401050  push        offset string "2" (402138h) 

00401055  push        ecx  

		break;

00401056  jmp         wmain+6Bh (40106Bh) 

	{

	case 1:

		cout<<"1"<<endl;

00401058  mov         edx,dword ptr [__imp_std::endl (402038h)] 

0040105E  mov         eax,dword ptr [__imp_std::cout (402048h)] 

00401063  push        edx  

00401064  push        ecx  

00401065  push        offset string "1" (402134h) 

0040106A  push        eax  

0040106B  call        std::operator<<<std::char_traits<char> > (401220h) 

00401070  add         esp,0Ch 

00401073  mov         ecx,eax 

00401075  call        dword ptr [__imp_std::basic_ostream<char,std::char_traits<char> >::operator<< (402040h)] 

	default:

		break;

	}





	if( 1==i )

0040107B  mov         eax,dword ptr [esp+4] 

0040107F  cmp         eax,1 

00401082  jne         wmain+9Ah (40109Ah) 

	{

		cout<<"1"<<endl;

00401084  mov         ecx,dword ptr [__imp_std::endl (402038h)] 

0040108A  mov         edx,dword ptr [__imp_std::cout (402048h)] 

00401090  push        ecx  

00401091  push        ecx  

00401092  push        offset string "1" (402134h) 

00401097  push        edx  

00401098  jmp         wmain+0CCh (4010CCh) 

	}

	else if( 2==i )

0040109A  cmp         eax,2 

0040109D  jne         wmain+0B4h (4010B4h) 

	{

		cout<<"2"<<endl;

0040109F  mov         eax,dword ptr [__imp_std::endl (402038h)] 

004010A4  push        eax  

004010A5  push        ecx  

004010A6  mov         ecx,dword ptr [__imp_std::cout (402048h)] 

004010AC  push        offset string "2" (402138h) 

004010B1  push        ecx  

004010B2  jmp         wmain+0CCh (4010CCh) 

	}

	else if( 10==i )

004010B4  cmp         eax,0Ah 

004010B7  jne         wmain+0DCh (4010DCh) 

	{

		cout<<"10"<<endl;

004010B9  mov         edx,dword ptr [__imp_std::endl (402038h)] 

004010BF  mov         eax,dword ptr [__imp_std::cout (402048h)] 

004010C4  push        edx  

004010C5  push        ecx  

004010C6  push        offset string "10" (40213Ch) 

004010CB  push        eax  

004010CC  call        std::operator<<<std::char_traits<char> > (401220h) 

004010D1  add         esp,0Ch 

004010D4  mov         ecx,eax 

004010D6  call        dword ptr [__imp_std::basic_ostream<char,std::char_traits<char> >::operator<< (402040h)] 

	}



	return 0;

004010DC  xor         eax,eax 

}

//这里是原C++代码



int _tmain(int argc, _TCHAR* argv[])

{

	int i;





	cin>>i;

	switch (i)

	{

	case 1:

		cout<<"1"<<endl;

		break;

	case 2:

		cout<<"2"<<endl;

		break;

	case 10:

		cout<<"10"<<endl;

		break;

	default:

		break;

	}





	if( 1==i )

	{

		cout<<"1"<<endl;

	}

	else if( 2==i )

	{

		cout<<"2"<<endl;

	}

	else if( 10==i )

	{

		cout<<"10"<<endl;

	}



	return 0;

}