计算机网络 实验之 windows下 C++ 实现 socket 编程展示

本篇博客只是先展示一下代码，具体的编程相关请看后面的博客吧

服务器端代码 server.cpp

#include <stdio.h>
#include <winsock2.h>

#pragma comment(lib,"ws2_32.lib")

int main(int argc, char* argv[])
{
    //初始化WSA
    WORD sockVersion = MAKEWORD(2,2);
    WSADATA wsaData;
    if(WSAStartup(sockVersion, &wsaData)!=0)
    {
        return 0;
    }

    //创建套接字
    SOCKET slisten = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
    if(slisten == INVALID_SOCKET)
    {
        printf("socket error !");
        return 0;
    }

    //绑定IP和端口
    sockaddr_in sin;
    sin.sin_family = AF_INET;
    sin.sin_port = htons(8888);
    sin.sin_addr.S_un.S_addr = INADDR_ANY;
    if(bind(slisten, (LPSOCKADDR)&sin, sizeof(sin)) == SOCKET_ERROR)
    {
        printf("bind error !");
    }

    //开始监听
    if(listen(slisten, 5) == SOCKET_ERROR)
    {
        printf("listen error !");
        return 0;
    }

    //循环接收数据
    SOCKET sClient;
    sockaddr_in remoteAddr;
    int nAddrlen = sizeof(remoteAddr);
    char revData[255];
    while (true)
    {
        printf("等待连接...
");
        sClient = accept(slisten, (SOCKADDR *)&remoteAddr, &nAddrlen);
        if(sClient == INVALID_SOCKET)
        {
            printf("accept error !");
            continue;
        }
        printf("接受到一个连接：%s 
", inet_ntoa(remoteAddr.sin_addr));

        //接收数据
        int ret = recv(sClient, revData, 255, 0);
        if(ret > 0)
        {
            revData[ret] = 0x00;
            printf(revData);
        }

        //发送数据
        const char * sendData = "你好，TCP客户端！
";
        send(sClient, sendData, strlen(sendData), 0);
        closesocket(sClient);
    }

    closesocket(slisten);
    WSACleanup();
    return 0;
}

客户端代码 client.cpp:

#include<WINSOCK2.H>
#include<STDIO.H>
#include<iostream>
#include<cstring>
using namespace std;
#pragma comment(lib, "ws2_32.lib")

int main()
{
    WORD sockVersion = MAKEWORD(2, 2);
    WSADATA data;
    if(WSAStartup(sockVersion, &data)!=0)
    {
        return 0;
    }
    while(true){
        SOCKET sclient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
        if(sclient == INVALID_SOCKET)
        {
            printf("invalid socket!");
            return 0;
        }

        sockaddr_in serAddr;
        serAddr.sin_family = AF_INET;
        serAddr.sin_port = htons(8888);
        serAddr.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");
        if(connect(sclient, (sockaddr *)&serAddr, sizeof(serAddr)) == SOCKET_ERROR)
        {  //连接失败
            printf("connect error !");
            closesocket(sclient);
            return 0;
        }

        string data;
        cin>>data;
        const char * sendData;
        sendData = data.c_str();   //string转const char*
        //char * sendData = "你好，TCP服务端，我是客户端
";
        send(sclient, sendData, strlen(sendData), 0);
        //send()用来将数据由指定的socket传给对方主机
        //int send(int s, const void * msg, int len, unsigned int flags)
        //s为已建立好连接的socket，msg指向数据内容，len则为数据长度，参数flags一般设0
        //成功则返回实际传送出去的字符数，失败返回-1，错误原因存于error

        char recData[255];
        int ret = recv(sclient, recData, 255, 0);
        if(ret>0){
            recData[ret] = 0x00;
            printf(recData);
        }
        closesocket(sclient);
    }


    WSACleanup();
    return 0;

}

在Codeblocks中如果不进行一些措施可能报以下错误：

解决方法：

右键相关project:

 

去codeblocks相关文件夹下找到此文件，添加就好了：

 如何同时运行两个程序呢？

1.找到你所建的项目的文件夹：

 

 

 这就ok啦~~~