四 看过之前讲解能写出的代码

（1）windows平台下：

/**************************************
function:server on windows
coder:BSilence
**************************************/

#include "stdafx.h"
#include <winsock2.h>
#pragma comment(lib,"ws2_32.lib")
#define LISTEN_PORT 10096

bool InitSocket()
{
	WORD    wVersionRequested;
	WSADATA wsaData;
	int     err; 
	
	wVersionRequested = MAKEWORD( 2, 0 ); 
	err = WSAStartup( wVersionRequested, &wsaData );
	if ( err != 0 ) 
	{
		perror("init socket error!\n");                            
		return FALSE;
	}
	return TRUE;
}
int main(int argc, char* argv[])
{
	int error = InitSocket();
	if(error == FALSE)
	{
		return -1;
	}

	int sock_serv = socket(AF_INET, SOCK_STREAM, 0);//创建socket
	if(sock_serv < 0)
	{
        perror("socket error!\n");
        return -1;
    }
	struct sockaddr_in server_addr;//服务器socket结构体
	memset( &server_addr, 0, sizeof(server_addr) );	
    server_addr.sin_family = AF_INET;
    server_addr.sin_port   = htons(LISTEN_PORT);
    server_addr.sin_addr.s_addr = htonl( INADDR_ANY );//填入本机IP地址

    int flag = bind(sock_serv, (struct sockaddr*)&server_addr, sizeof(server_addr));//绑定socket到指定端口上
    if(flag < 0)
	{
        perror("bind error!\n");
        closesocket(sock_serv);
        return -1;
    }
	flag = listen(sock_serv, 5);//监听socket
    if(flag < 0)
	{
        perror("listen error!\n");
        closesocket(sock_serv);
        return -1;
    }
	printf("*******************************************************************************");
	printf("*****************************Server already start!*****************************");
	printf("*********************************************************************************\n");
    char buffer[1024];//系统接收缓冲区
    while(1){
		
        //bzero(buffer,sizeof(buffer));//linux下
		memset(buffer,0,sizeof(buffer));
        struct sockaddr_in client_addr;//客户端socket结构体
        int size = sizeof(client_addr);
        int sock_client = accept(sock_serv, (struct sockaddr*)(&client_addr),&size);//接收连接并创建传输套接字
        if(sock_client < 0)
		{
            perror("accept error!\n");
            continue;
        }
		memset(buffer,0,sizeof(buffer));
        strcpy(buffer, "this is server! welcome!\n");
        send(sock_client, buffer, 1024, 0);//发送数据
		while(1)
		{
			memset(buffer,0,sizeof(buffer));
			flag = recv(sock_client, buffer, 1024, 0);//接收数据
			if(flag < 0)
			{
				perror("recv error!\n");
				closesocket(sock_serv);
				return -1;
			}
			printf("recv : %s\n",buffer);
			printf("i have recv buffer\n");
			printf("recv : %s\n",buffer);
			if(strcmp(buffer,"quit") == 0)
			{
				printf("quit!!!\n");
				break;
			}
		}
    }
	closesocket(sock_serv);
	return 0;
}

/**************************************
function:client on windows
coder:BSilence
**************************************/

#include "stdafx.h"
#include <iostream.h>
#include "winsock2.h"
#pragma comment(lib,"ws2_32.lib")
#define SERVER_PORT 10096
#define SERVER_IP "127.0.0.1"

bool InitSocket()
{
	WORD    wVersionRequested;
	WSADATA wsaData;
	int     err; 
	
	wVersionRequested = MAKEWORD( 2, 0 ); 
	err = WSAStartup( wVersionRequested, &wsaData );
	if ( err != 0 ) 
	{
		perror("init socket error!\n");                            
		return FALSE;
	}
	return TRUE;
}
int main(int argc, char* argv[])
{
	int error = InitSocket();
	if(error == FALSE)
	{
		return -1;
	}
	
	int sock_client = socket(AF_INET, SOCK_STREAM, 0);
	if(sock_client < 0 ){
        perror("socket error!\n");
        return -1;
    }
    struct sockaddr_in server_addr;
    //bzero(&server_addr, sizeof(struct sockaddr_in));//linux下使用
	memset(&server_addr,0,sizeof(server_addr));
    server_addr.sin_family         = AF_INET;
    server_addr.sin_port           = htons(SERVER_PORT);
    server_addr.sin_addr.s_addr = inet_addr(SERVER_IP);
	
    int flag = connect(sock_client,(struct sockaddr*)(&server_addr), sizeof(struct sockaddr));//连接服务器
    if(flag < 0){
        perror("connect error!\n");
        closesocket(sock_client);
        return -1;
    }
	
    printf("connect to server : OK! \n");
	
    char buffer[1024];

	memset(buffer,0,sizeof(buffer));
    recv(sock_client, buffer, 1024, 0);//发送数据
    printf("recv : %s\n", buffer);
	
	memset(buffer,0,sizeof(buffer));
    strcpy(buffer,"this is client!\n");
    send(sock_client, buffer, 1024, 0);
	
    while(1){
		memset(buffer,0,sizeof(buffer));
        cin>>buffer;
        int p = strlen(buffer);
        buffer[p] = ‘\0‘;
        send(sock_client, buffer, 1024, 0);
        printf("i have send buffer\n");
    }
    closesocket(sock_client);	
	return 0;
}

服务器开发【三】----网络编程的基础SOCKET（3）,布布扣,bubuko.com

服务器开发【三】----网络编程的基础SOCKET（3）

原文：http://blog.csdn.net/b_silence/article/details/20078609