为啥我在VC2008.Release下反汇编switch代码，会跳出2个_main的入口函数？
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;}如需要阅读该回复，请登录或注册CSDN!