编写一段VS2013环境下C++示例代码，一个程序往另外一个程序发送数据包，使用TCP通信协议

下面是一个使用TCP通信协议的示例代码，其中一个程序作为服务器接收数据包，另一个程序作为客户端发送数据包。

服务器端代码（接收数据包）：

#include <WinSock2.h>
#include <iostream>

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

int main()
{
    // 初始化Winsock
    WSADATA wsaData;
    if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0)
    {
        std::cerr << "Failed to initialize winsock" << std::endl;
        return 1;
    }

    // 创建服务器端socket
    SOCKET serverSocket = socket(AF_INET, SOCK_STREAM, 0);
    if (serverSocket == INVALID_SOCKET)
    {
        std::cerr << "Failed to create server socket" << std::endl;
        WSACleanup();
        return 1;
    }

    // 绑定IP地址和端口号
    sockaddr_in serverAddr;
    serverAddr.sin_family = AF_INET;
    serverAddr.sin_port = htons(12345); // 设置端口号，这里使用12345
    serverAddr.sin_addr.s_addr = INADDR_ANY;

    if (bind(serverSocket, (struct sockaddr*)&serverAddr, sizeof(serverAddr)) == SOCKET_ERROR)
    {
        std::cerr << "Failed to bind server socket" << std::endl;
        closesocket(serverSocket);
        WSACleanup();
        return 1;
    }

    // 监听连接请求
    if (listen(serverSocket, 1) == SOCKET_ERROR)
    {
        std::cerr << "Failed to listen on server socket" << std::endl;
        closesocket(serverSocket);
        WSACleanup();
        return 1;
    }

    std::cout << "Waiting for client to connect..." << std::endl;

    // 接受客户端连接请求
    SOCKET clientSocket;
    sockaddr_in clientAddr;
    int addrLen = sizeof(clientAddr);
    clientSocket = accept(serverSocket, (struct sockaddr*)&clientAddr, &addrLen);
    if (clientSocket == INVALID_SOCKET)
    {
        std::cerr << "Failed to accept client connection" << std::endl;
        closesocket(serverSocket);
        WSACleanup();
        return 1;
    }

    std::cout << "Client connected" << std::endl;

    // 接收数据包
    char buffer[1024];
    int bytesRead;
    while (true)
    {
        bytesRead = recv(clientSocket, buffer, sizeof(buffer), 0);
        if (bytesRead <= 0)
            break;

        // 处理接收到的数据包
        // ...

        std::cout << "Received data: " << buffer << std::endl;
    }

    // 关闭连接和socket
    closesocket(clientSocket);
    closesocket(serverSocket);
    WSACleanup();

    return 0;
}

客户端代码（发送数据包）：

#include <WinSock2.h>
#include <iostream>

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

int main()
{
    // 初始化Winsock
    WSADATA wsaData;
    if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0)
    {
        std::cerr << "Failed to initialize winsock" << std::endl;
        return 1;
    }

    // 创建客户端socket
    SOCKET clientSocket = socket(AF_INET, SOCK_STREAM, 0);
    if (clientSocket == INVALID_SOCKET)
    {
        std::cerr << "Failed to create client socket" << std::endl;
        WSACleanup();
        return 1;
    }

    // 设置服务器的IP地址和端口号
    sockaddr_in serverAddr;
    serverAddr.sin_family = AF_INET;
    serverAddr.sin_port = htons(12345); // 设置服务器端口号，这里使用12345
    serverAddr.sin_addr.s_addr = inet_addr("127.0.0.1"); // 设置服务器IP地址，这里使用本地回环地址

    // 连接到服务器
    if (connect(clientSocket, (struct sockaddr*)&serverAddr, sizeof(serverAddr)) == SOCKET_ERROR)
    {
        std::cerr << "Failed to connect to server" << std::endl;
        closesocket(clientSocket);
        WSACleanup();
        return 1;
    }

    std::cout << "Connected to server" << std::endl;

    // 发送数据包
    char buffer[] = "Hello, server!";
    int bytesSent = send(clientSocket, buffer, sizeof(buffer), 0);
    if (bytesSent == SOCKET_ERROR)
    {
        std::cerr << "Failed to send data" << std::endl;
        closesocket(clientSocket);
        WSACleanup();
        return 1;
    }

    std::cout << "Data sent" << std::endl;

    // 关闭连接和socket
    closesocket(clientSocket);
    WSACleanup();

    return 0;
}

以上是一个简单的示例，展示了如何使用TCP通信协议在VS2013环境下进行数据包的发送和接收。请注意，这段代码仅供参考，实际使用中可能需要根据具体需求进行修改。