client.cpp

一个基于windows api 的源程序...有很强的参考价值

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <winsock.h>
#include "connect_client.C"
#pragma comment(lib,"wsock32")

#ifndef INADDR_NONE
#define INADDR_NONE 0xffffffff
#endif


SOCKET  TCPconnect(const char *,const char *);
void    TCPecho(char *,char *);

#define LINELEN   128
#define WAVERS    MAKEWORD(2,0)
  
void main(int argc,char *argv[])
{
  char  *host = "localhost";
  char  *service = "8080";
  WSADATA  wsadata;
  
  switch(argc)
  {
  	case  1 :
  		 host= "localhost";
  		 break;
  	case  2 :
  	         host=argv[1];
  	         break;
  	case  3:
  	         host=argv[1];
  	         service=argv[2];
  	         break;  
  	default:
  		 printf("argment error\n");
  		 exit(1);                         	 
  }

  if(WSAStartup(WAVERS,&wsadata)!=0)
  {
        printf("initalize failed\n");  
  	WSACleanup();
 	exit(1);  
  }
  /********************/
  
  TCPecho(host,service);
  
  /********************/
  WSACleanup();
  exit(0);
}

void    TCPecho(char *host,char *service)
{
  char     buf[LINELEN+1];
  SOCKET   s;
  int      outchars;
  
  s = TCPconnect(host,service);
  
  while(fgets(buf,sizeof(buf),stdin))
  {
     buf[LINELEN]='\0';
     outchars=strlen(buf);
     send(s,buf,outchars,0); 

	 if(buf[0]=='\n')
        break;
  }
  
  closesocket(s);

}