DEVC++需要加入ws2_32库

#include <iostream>
#include <winsock2.h>#pragma comment(lib, "ws2_32.lib")void sendData(const char* ip, int port, const char* data) {WSADATA wsaData;SOCKET sockfd;struct sockaddr_in server_addr;// 初始化Winsockif (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0) {std::cerr << "WSAStartup failed" << std::endl;return;}// 创建socketsockfd = socket(AF_INET, SOCK_STREAM, 0);if (sockfd == INVALID_SOCKET) {std::cerr << "Error creating socket" << std::endl;WSACleanup();return;}// 设置服务器地址server_addr.sin_family = AF_INET;server_addr.sin_port = htons(port);server_addr.sin_addr.s_addr = inet_addr(ip);// 连接服务器if (connect(sockfd, (struct sockaddr*)&server_addr, sizeof(server_addr)) == SOCKET_ERROR) {std::cerr << "Connection failed" << std::endl;closesocket(sockfd);WSACleanup();return;}// 发送数据if (send(sockfd, data, strlen(data), 0) == SOCKET_ERROR) {std::cerr << "Send failed" << std::endl;} else {std::cout << "Data sent successfully" << std::endl;}// 关闭socketclosesocket(sockfd);WSACleanup();
}int main() {const char* ip = "127.0.0.1"; // 替换为目标服务器的IP地址int port = 5009; // 替换为目标服务器的端口const char* data = "Hello, Server!";sendData(ip, port, data);return 0;
}