7a) TCP Client-Server Communication (Windows)

Files:
- server.cpp (TCP Server)
- client.cpp (TCP Client)

SERVER (server.cpp):
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#include <iostream>
#include <winsock2.h>

#pragma comment(lib, "ws2_32.lib") // Winsock library

int main() {
    WSADATA wsa;
    WSAStartup(MAKEWORD(2, 2), &wsa);

    SOCKET serverSocket = socket(AF_INET, SOCK_STREAM, 0);

    sockaddr_in serverAddr;
    serverAddr.sin_family = AF_INET;
    serverAddr.sin_addr.s_addr = INADDR_ANY;
    serverAddr.sin_port = htons(8080);

    bind(serverSocket, (sockaddr*)&serverAddr, sizeof(serverAddr));
    listen(serverSocket, 5);

    std::cout << "Waiting for client...\n";
    SOCKET clientSocket = accept(serverSocket, nullptr, nullptr);

    char buffer[1024] = {0};
    recv(clientSocket, buffer, sizeof(buffer), 0);
    std::cout << "Message from client: " << buffer << std::endl;

    closesocket(clientSocket);
    closesocket(serverSocket);
    WSACleanup();
    return 0;
}
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Terminal Command (Windows):
1) g++ server.cpp -o server -lws2_32
2) .\server.exe
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CLIENT (client.cpp):
---------------------------------------------------------------

#include <iostream>
#include <winsock2.h>

#pragma comment(lib, "ws2_32.lib") // Winsock library

int main() {
    WSADATA wsa;
    WSAStartup(MAKEWORD(2, 2), &wsa);

    SOCKET clientSocket = socket(AF_INET, SOCK_STREAM, 0);

    sockaddr_in serverAddr;
    serverAddr.sin_family = AF_INET;
    serverAddr.sin_addr.s_addr = inet_addr("127.0.0.1");
    serverAddr.sin_port = htons(8080);

    connect(clientSocket, (sockaddr*)&serverAddr, sizeof(serverAddr));

    const char* message = "Hello, server!";
    send(clientSocket, message, strlen(message), 0);

    closesocket(clientSocket);
    WSACleanup();
    return 0;
}
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Terminal Command (Windows):
1) g++ client.cpp -o client -lws2_32
2) .\client.exe