用C语言进行最基本的socket编程

#include <Winsock2.h>
#pragma comment(lib,"Ws2_32.lib")
#include <stdio.h>
#include <memory.h>

void main()
{
WSAData wsd;
WSAStartup(MAKEWORD(2,0),&wsd);

SOCKET s =NULL;
s=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
struct sockaddr_in ch;
memset(&ch,sizeof(ch));
ch.sin_family=AF_INET;
ch.sin_addr.s_addr=INADDR_ANY;
ch.sin_port=htons(1041);
int b=bind(s,(struct sockaddr *) &ch,sizeof(ch));
#define QUEUE_SIZE 5
int l=listen(s,QUEUE_SIZE);
printf("正在监听本机的1041端口！n");
SOCKET sc=accept(s,0);
printf("客户端已经连接到本机的1041端口！n");
#define BUF_SIZE 4096
int receByt=0;
while(1)
{
char buf[BUF_SIZE];
receByt=recv(sc,buf,BUF_SIZE,0);
buf[receByt]='';
if(receByt>0)
{
printf("接收的消息是：%sn",buf);
}
else
{
printf("接收消息结束！");
break;
}

}
int ic=closesocket(sc);
int is=closesocket(s);

}

#include <Winsock2.h>
#pragma comment(lib,"Ws2_32.lib")
#include <stdio.h>
#include <memory.h>
#include <string.h>

void main()
{
WSAData wsd;
WSAStartup(MAKEWORD(2,sizeof(ch));
ch.sin_family=AF_INET;
ch.sin_addr.s_addr=inet_addr("127.0.0.1");
ch.sin_port=htons(1041);

int c=connect(s,sizeof(ch));
printf("已经连接到服务器的1041端口！现在可以向服务器发送消息了！n");
#define BUF_SIZE 4096
char info[1024],buf[BUF_SIZE];

while(1)
{
gets(info);
if(info[0]=='')
break;
strcpy(buf,info);
int nsend=send(s,strlen(buf),0);

}
int ic=closesocket(s);
}

#include <Winsock2.h>
#pragma comment(lib,"Ws2_32.lib")
#include <stdio.h>
#include <memory.h>
#include <string.h>
#include <pthread.h>


void Receive();
void Send();
void creatThread();

SOCKET s =NULL;
pthread_t t[1000];
int threadCount=0;

void main(int argc,char* argv[])
{
  printf("本程序制作人学号：713901040041n");
  printf("程序说明：服务器端和客户端为同一个程序，请使用不同的参数运行.n");
  printf("接收程序请使用 r参数；发送程序请使用 s参数。n");
  //printf("len : %dn",argc);
  //printf("count %dn",argc);
  //printf("value: %sn",argv[1]);
  //printf("%d",argv[1][0]=='r');

  if(argc<=1)
  {
    printf("please input program arguments ...n");
    exit(0);
  }
  if(argc>1 && argv[1][0]=='r')
  {
    printf("run receive ...n");
    Receive();
  }
  if(argc>1 && argv[1][0]=='s')
  {
    printf("run send ...n");
    Send();
  }
}


void* receiveWork(void * args)
{
  SOCKET sc=accept(s,0);
  if(sc==INVALID_SOCKET)
  {
    printf("sc Error");
  }
  creatThread();

  printf("----------客户端已经连接到本机的%d线程连接！n",threadCount-2);
#define BUF_SIZE 4096
  int receByt=0;
  while(1)
  {
    char buf[BUF_SIZE];
    receByt=recv(sc,0);
    buf[receByt]='';
    if(receByt>0)
    {
      printf("线程接收的消息是：%sn",buf);
    }
    else
    {
      printf("客户端已退出，");
      break;
    }
      
  }
  int ic=closesocket(sc);
  printf("服务器结束连接！n");
  return NULL;
}

void creatThread()
{
  pthread_create(&t[threadCount++],NULL,receiveWork,NULL);
}


void Receive()
{
  WSAData wsd;
  WSAStartup(MAKEWORD(2,&wsd);  
  s=socket(AF_INET,IPPROTO_TCP);
  if(s==INVALID_SOCKET)
  {
    printf("socket created Error");
  }
  struct sockaddr_in ch;
  memset(&ch,sizeof(ch));
  ch.sin_family=AF_INET;
  ch.sin_addr.s_addr=INADDR_ANY;
  ch.sin_port=htons(1041);
  int b=bind(s,sizeof(ch));
  if(b==SOCKET_ERROR)
  {
    printf("bind 失败，出错代码是：%dn",WSAGetLastError());
    exit(0);
  }
#define QUEUE_SIZE 5
  int l=listen(s,QUEUE_SIZE);
  printf("正在监听本机的1041端口！n");
  
  creatThread();

  for(int i=0;i<1000;i++)
  {
    pthread_join(t[i],NULL);
  }

int is=closesocket(s);
}



void Send()
{
  WSAData wsd;
  WSAStartup(MAKEWORD(2,&wsd);

  SOCKET s =NULL;
  s=socket(AF_INET,sizeof(ch));
  ch.sin_family=AF_INET;
  ch.sin_addr.s_addr=inet_addr("127.0.0.1");
  ch.sin_port=htons(1041);

  int c=connect(s,sizeof(ch));
  printf("已经连接到服务器的1041端口！现在可以向服务器发送消息了！n");
#define BUF_SIZE 4096
  char info[1024],buf[BUF_SIZE];

  while(1)
  {
    gets(info);
    if(info[0]=='')
      break;
    strcpy(buf,info);
    int nsend=send(s,0);
  }
  int ic=closesocket(s);
}