这里是一位初学 Windows Socket 网络编程的小白。

这里有两份源代码，一份是服务端的，一份是客户端的。

//Serve.cpp
//代码网上找的,dev-c++ 运行可以通过
#include<stdio.h>
#include<stdlib.h>
#include<iostream>
#include<cstring>
#include<WinSock2.h>

//链接ws2_32_lib库文件到此项目中
#pragma comment(lib,"ws2_32.lib")
using namespace std;

//===============全局变量===================
//设置缓冲区
const int BUF_SIZE = 2048;
SOCKET sockSer, sockCli;
SOCKADDR_IN addrSer, addrCli;
int naddr = sizeof(SOCKADDR_IN);

char sendbuf[BUF_SIZE];
char recvbuf[BUF_SIZE];

//===============函数声明===================
int main()
{
    cout << "service starting..." << endl;

    //加载socket库
    WSADATA wsadata;
    if (WSAStartup(MAKEWORD(2, 2), &wsadata) != 0)
    {
        cout << "Load socket database faild." << endl;
        system("pause");
        return 0;
    }
    else
    {
        cout << "Load socket database success." << endl;
    }
    //创建socket套接字
    sockSer = socket(AF_INET, SOCK_STREAM, 0);
    //描述协议族，INET属于ipv4
    //SOCK_STREAM创建套接字类型：tcp
    //SOCK_DGRAM创建套接字类型：udp
    //0不指定协议，常用的就是tcp，udp

    //初始化地址包
    addrSer.sin_addr.s_addr = inet_addr("192.168.1.103");
    addrSer.sin_family = AF_INET;
    addrSer.sin_port = htons(1111);

    //分配IP地址与端口号--绑定
    bind(sockSer, (SOCKADDR*)&addrSer, sizeof(SOCKADDR));
    //强制将SOCKADDR_IN转化为SOCKADDR

    //监听可接收请求状态
    while (true)
    {
        cout << "connect starting.." << endl;
        //监听连接请求
        cout<<"COME3\n";
        listen(sockSer, 5);
        //等待连接最大数：5
        cout<<"COME1\n";
        //接收连接
        sockCli = accept(sockSer, (SOCKADDR*)&addrCli, &naddr);
        cout<<"COME2\n";
        if (sockCli != INVALID_SOCKET)
        {
            while (true)
            {
                cout << "connect success!" << endl;
                cout << "sending$:" ;
                cin >> sendbuf;
                //向客户端发送信息
                send(sockCli, sendbuf, sizeof(sendbuf), 0);
                //接收客户端信息
                recv(sockCli, recvbuf, sizeof(recvbuf), 0);

                cout << "receviced: " << recvbuf << endl;
                system("pause");
            }
        }
        else
        {
            cout << "connect faild!!" << endl;
        }
    }
    closesocket(sockSer);
    closesocket(sockCli);

    system("pause");
    return 0;
}

//Client.cpp
#include<stdio.h>
#include<stdlib.h>
#include<iostream>
#include<cstring>
#include<WinSock2.h>

//链接ws2_32_lib库文件到此项目中
#pragma comment(lib,"ws2_32.lib")
using namespace std;

//===============全局变量===================
//设置缓冲区
const int BUF_SIZE = 2048;
SOCKET sockSer, sockCli;
SOCKADDR_IN addrSer, addrCli;
int naddr = sizeof(SOCKADDR_IN);

char sendbuf[BUF_SIZE];
char recvbuf[BUF_SIZE];

//===============函数声明===================
int main()
{
    cout << "client starting..." << endl;

    //加载socket库
    WSADATA wsadata;
    if (WSAStartup(MAKEWORD(2, 2), &wsadata) != 0)
    {
        cout << "Load socket database faild." << endl;
        system("pause");
        return 0;
    }
    else
    {
        cout << "Load socket database success." << endl;
    }
    //创建socket套接字
    sockCli = socket(AF_INET, SOCK_STREAM, 0);
    //描述协议族，INET属于ipv4
    //SOCK_STREAM创建套接字类型：tcp
    //SOCK_DGRAM创建套接字类型：udp
    //0不指定协议，常用的就是tcp，udp

    //初始化客户端地址包
    addrCli.sin_addr.s_addr = inet_addr("127.0.0.1");
    addrCli.sin_family = AF_INET;
    addrCli.sin_port = htons(1111);

    //初始化服务器地址
    addrSer.sin_addr.s_addr = inet_addr("192.168.1.103");
    addrSer.sin_family = AF_INET;
    addrSer.sin_port = htons(1111);

    while (true)
    {
        if (connect(sockCli, (SOCKADDR*)&addrSer, sizeof(addrSer) )!= SOCKET_ERROR);
        {
            while (true)
            {
                cout << "connect success!" << endl;
                recv(sockCli, recvbuf, sizeof(recvbuf), 0);
                cout << "receviced: " << recvbuf << endl;

                cout << "sending$:" ;
                cin >> sendbuf;
                //向客户端发送信息
                send(sockCli, sendbuf, sizeof(sendbuf), 0);
                cout << "send success!" << endl;
                system("pause");
            }
        }
        cout << "send faild!" << endl;

    }
    closesocket(sockSer);
    closesocket(sockCli);

    system("pause");
    return 0;
}

现在它们生成的 Serve.exe 和 Client.exe 可以实现在局域网里相互通信。

请问如何让它们实现跨网断通信呢？希望具体的教程视频/博客/文章。

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