Windows下python与c++之间的通信代码示例

在 Windows 下，Python 与 C++ 之间的通信可以通过多种方式实现，比如使用共享内存、管道、Socket 等。这里以使用 Socket 进行通信为例，给出一个简单的代码示例。

首先是 C++ 端的代码，使用 Winsock2 库实现 Socket 通信：

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

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

int main() {
    // 初始化 Winsock2 库
    WSADATA wsaData;
    if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0) {
        std::cout << "WSAStartup failed!" << std::endl;
        return -1;
    }

    // 创建 Socket
    SOCKET s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
    if (s == INVALID_SOCKET) {
        std::cout << "socket failed!" << std::endl;
        WSACleanup();
        return -1;
    }

    // 绑定本地地址和端口
    sockaddr_in addr;
    addr.sin_family = AF_INET;
    addr.sin_port = htons(1234);
    addr.sin_addr.s_addr = htonl(INADDR_ANY);
    if (bind(s, (sockaddr*)&addr, sizeof(addr)) == SOCKET_ERROR) {
        std::cout << "bind failed!" << std::endl;
        closesocket(s);
        WSACleanup();
        return -1;
    }

    // 监听连接请求
    if (listen(s, SOMAXCONN) == SOCKET_ERROR) {
        std::cout << "listen failed!" << std::endl;
        closesocket(s);
        WSACleanup();
        return -1;
    }

    std::cout << "Waiting for connection..." << std::endl;

    // 接受连接请求
    SOCKET clientSock = accept(s, NULL, NULL);
    if (clientSock == INVALID_SOCKET) {
        std::cout << "accept failed!" << std::endl;
        closesocket(s);
        WSACleanup();
        return -1;
    }

    std::cout << "Connected!" << std::endl;

    // 接收数据并发送回复
    char buffer[1024];
    int recvLen;
    while (true) {
        recvLen = recv(clientSock, buffer, sizeof(buffer), 0);
        if (recvLen <= 0) break;
        buffer[recvLen] = '\0';
        std::cout << "Received: " << buffer << std::endl;
        send(clientSock, buffer, recvLen, 0);
    }

    // 关闭 Socket
    closesocket(clientSock);
    closesocket(s);
    WSACleanup();

    return 0;
}

接下来是 Python 端的代码，同样使用 Socket 库实现通信：

import socket

# 创建 Socket
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

# 连接服务器
s.connect(('localhost', 1234))
print('Connected!')

# 发送数据并接收回复
while True:
    message = input('Enter message: ')
    s.send(message.encode())
    if message == 'exit':
        break
    data = s.recv(1024)
    print('Received:', data.decode())

# 关闭 Socket
s.close()

以上代码示例只是最简单的实现，实际应用中还需要考虑数据格式、数据长度、错误处理等问题。