Socket programming recv () function

Socket programming recv () function-general Linux technology-Linux programming and kernel information. The following is a detailed description. # Include
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Main ()
{Struct sockaddr_in local, server;
Int soc, soc_temp, len_server;
Int len = sizeof (struct sockaddr_in );
Char in [9999], * out = "hello word", * err;
Printf ("socket now the len is % d \ n", len );
If (soc = socket (AF_INET, SOCK_STREAM, 0) =-1)
{
Perror ("socket error! ");
Exit (0 );
}
Printf ("soc is % d \ n", soc );
Local. sin_family = AF_INET;/* 21 */
Local. sin_port = htons (3777 );
Local. sin_addr.s_addr = inet_addr ("127.0.0.1 ");
Bzero (& local, len );
If (connect (soc, (struct sockaddr *) & local, len) =-1)
{
Perror ("\ n connect error ");
Exit (0 );
}
Else printf ("\ n connectsucess \ n ");
Printf ("begian to send \ n ");
If (recv (soc, in, 999,0) =-1)
{
Perror ("errno ");
Exit (0 );
}
Else printf ("read success \ n ");
Close (soc );
Printf ("it's time to sleep ");
}
~
The following result is displayed:
Socket now the len is 16
Soc is 3

Connectsucess
Begian to send
Errno: Transport endpoint is not connected
What is the problem? Hope you can enlighten me!