C语言实现简单的Socket服务器：代码示例和讲解

以下是一个简单的C语言Socket服务器的实现示例：\n\nc\n#include <stdio.h>\n#include <stdlib.h>\n#include <string.h>\n#include <sys/socket.h>\n#include <netinet/in.h>\n\n#define PORT 8080\n#define BUFFER_SIZE 1024\n\nint main() {\n int server_fd, new_socket, valread;\n struct sockaddr_in address;\n int addrlen = sizeof(address);\n char buffer[BUFFER_SIZE] = {0};\n char *response = "Hello from server";\n\n // 创建socket\n if ((server_fd = socket(AF_INET, SOCK_STREAM, 0)) == 0) {\n perror("socket failed");\n exit(EXIT_FAILURE);\n }\n\n address.sin_family = AF_INET;\n address.sin_addr.s_addr = INADDR_ANY;\n address.sin_port = htons(PORT);\n\n // 绑定地址和端口\n if (bind(server_fd, (struct sockaddr *)&address, sizeof(address)) < 0) {\n perror("bind failed");\n exit(EXIT_FAILURE);\n }\n\n // 监听连接\n if (listen(server_fd, 3) < 0) {\n perror("listen failed");\n exit(EXIT_FAILURE);\n }\n\n printf("Server listening on port %d\n", PORT);\n\n // 接受连接\n if ((new_socket = accept(server_fd, (struct sockaddr *)&address, (socklen_t*)&addrlen)) < 0) {\n perror("accept failed");\n exit(EXIT_FAILURE);\n }\n\n // 读取客户端发送的数据\n valread = read(new_socket, buffer, BUFFER_SIZE);\n printf("Received message from client: %s\n", buffer);\n\n // 发送响应给客户端\n send(new_socket, response, strlen(response), 0);\n printf("Response sent to client\n");\n\n return 0;\n}\n\n\n这个例子创建了一个监听8080端口的Socket服务器。它接受客户端连接，读取客户端发送的数据，并发送一个简单的响应给客户端。\n\n请注意，这只是一个简单的示例，没有处理多个并发连接或错误处理。在实际应用中，您可能需要添加更多的代码来处理这些情况。