c++ socket编程的疑问

2013-07-07 02:32:19 152 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

Linux C/C++ Socket 编程 null null null null 阅读详情

socket类
class mclient{
private:
SOCKET sock;
sockaddr_in saddr;
int len;
char buf[4096];
public:
mclient()
{
sock=socket(AF_INET,SOCK_STREAM,0);
len=sizeof(saddr);
}

bool mconnect(char* addr,int port){
saddr.sin_family=AF_INET;
saddr.sin_port=htons(port);
saddr.sin_addr.s_addr=inet_addr(addr);
if(connect(sock,(struct sockaddr*)&saddr,len)==SOCKET_ERROR)
{
return false;
}
else
{
return true;
}
}

void close(){
closesocket(sock);
}

void msend(const char* mes,int length)
{
send(sock,mes,length,0);
}

bool receive(int flag){
memset(buf,0,4096);
if(recv(sock,buf,4096,0)==SOCKET_ERROR){
return false;
}
else
{
return true;
}
}
};

连接目标板的函数1
void Connect_Target_Board(void)
{
mclient a;
if(a.mconnect(bIpAddr,dwPort))
{
ConnectStatus = 1;
}
else
{
ConnectStatus = 0;
}
}

连接目标板的函数2
mclient a;
void Connect_Target_Board(void)
{

if(a.mconnect(bIpAddr,dwPort))
{
ConnectStatus = 1;
}
else
{
ConnectStatus = 0;
}
}

为什么函数1能够正常连接目标板，而函数2却不能连接目标板，只不过将类变量a弄成一个全局变量而已

...全文