关于一个socket在阻塞模式下是否还可以使用的实验

 1 void thread_socket(int socket)
 2 {
 3     Sleep(2000);
 4     int error = send(socket, "asd", strlen("asd"), 0);
 5 
 6     char recData[255] = {0};
 7     //setsockopt(socket, SOL_SOCKET, SO_RCVTIMEO, (char *)&time, sizeof(int));
 8     int ret = recv(socket, recData, 255, 0);
 9     getchar();
10 }
11 int main()
12 {
13     unsigned short port = 57001;
14 
15     char ch1[10] = { 1,2,3,4 };
16     memcpy(ch1, &port, 2);
17     string s1;
18     s1= string(ch1, 20);
19     string s("123", 2);
20     unsigned short unsi = 65510;
21     char *ch = ((char*)&unsi);
22 
23     char ccc[2] = {0};
24     unsigned short t = *((unsigned short *)(ch));
25 
26     WORD sockVersion = MAKEWORD(2, 2);
27     WSADATA data;
28     if (WSAStartup(sockVersion, &data) != 0)
29     {
30         return 0;
31     }
32     sockaddr_in serAddr;
33     serAddr.sin_family = AF_INET;
34     serAddr.sin_port = htons(8888);
35     inet_pton(AF_INET, "127.0.0.1", &serAddr.sin_addr);
36 
37     while (true)
38     {
39         SOCKET sclient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
40         if (sclient == INVALID_SOCKET)
41         {
42             printf("invalid socket!");
43             return 0;
44         }
45         if (connect(sclient, (sockaddr *)&serAddr, sizeof(serAddr)) == SOCKET_ERROR)
46         {  //连接失败 
47             printf("connect error !");
48             closesocket(sclient);
49             return 0;
50         }
51         send(sclient, "asd", strlen("asd"), 0);
52         char recData[255];
53         int nNetTimeout = 5000;
54         /*setsockopt(sclient, SOL_SOCKET, SO_RCVTIMEO, (char *)&nNetTimeout, sizeof(int));*/
55 
56         int opt_val;
57         socklen_t opt_len = sizeof(opt_val);
58         //getsockopt(sclient, IPPROTO_TCP, SO_SNDBUF, (char *)&opt_val, (socklen_t *)&opt_len);
59 
60         std::thread t(thread_socket, sclient);
61         int i = 2;
62         while (i--)
63         {
64             int ret = recv(sclient, recData, 255, 0);
65         if (ret > 0) {
66             recData[ret] = 0x00;
67             printf(recData);
68         }
69     }
70         closesocket(sclient);
71     }
72     WSACleanup();
73     return 0;
74 }