在unix下编写c++ 的socket
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tcp_server.cc

//
-----------------------------------------server program---------------------------
#include
<
iostream
>
using
namespace
std;
#include
<
sys
/
socket.h
>
#include
<
unistd.h
>
#include
<
netinet
/
in
.h
>
#include
<
arpa
/
inet.h
>
#include
<
signal.h
>
#include
<
sys
/
wait.h
>

/*struct in_addr{
in_addr_t s_addr;
};
struct sockaddr_in{
sa_family_t sin_family;
in_port_t sin_port;
struct in_addr sin_addr;
};*/
//
---------read/write function----------
void
req_proc(
int
s,
char
*
);

void
fn(
int
sig)
{
int pid = wait(NULL);
cout << "child " << pid << " clear" << endl;
signal(SIGCHLD,fn);

}
int
main()
{
if(signal(SIGCHLD,fn)==SIG_ERR){
cout << "capture signal error" << endl;
exit(0);
}
//1,socket(),create socket.
int fd = socket(AF_INET,SOCK_STREAM,0);
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