用c语言编写代码，实现简单的tcp传输

在C语言中，要实现简单的TCP传输，通常会使用套接字编程。以下是创建一个基本的服务器端和客户端程序的简单示例：

**服务器端（server.c）:**

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>

#define PORT 8080

int main(int argc, char *argv[]) {
    int server_fd, client_fd;
    struct sockaddr_in server_addr, client_addr;
    socklen_t addr_len = sizeof(struct sockaddr_in);
    char buffer[1024] = {0};

    // 创建套接字并绑定
    if ((server_fd = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
        perror("socket failed");
        exit(EXIT_FAILURE);
    }
    memset(&server_addr, 0, sizeof(server_addr));
    server_addr.sin_family = AF_INET;
    server_addr.sin_port = htons(PORT);
    server_addr.sin_addr.s_addr = INADDR_ANY;

    // 绑定和监听
    if (bind(server_fd, (struct sockaddr *)&server_addr, sizeof(server_addr)) == -1) {
        perror("bind failed");
        exit(EXIT_FAILURE);
    }
    listen(server_fd, 3);

    printf("Server started on port %d\n", PORT);

    // 接受连接
    while (true) {
        if ((client_fd = accept(server_fd, (struct sockaddr *)&client_addr, &addr_len)) == -1) {
            perror("accept failed");
            continue;
        }

        printf("Accepted connection from %s\n", inet_ntoa(client_addr.sin_addr));

        // 读取数据
        read(client_fd, buffer, sizeof(buffer));
        buffer[strcspn(buffer, "\n")] = '\0'; // 截断字符串

        printf("Received message: %s\n", buffer);

        // 关闭连接
        close(client_fd);
    }

    return 0;
}

**客户端（client.c）:**

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>

#define SERVER_IP "127.0.0.1"
#define PORT 8080

int main(int argc, char *argv[]) {
    int client_fd;
    struct sockaddr_in server_addr;
    socklen_t addr_len = sizeof(server_addr);
    char message[] = "Hello, Server!";

    if ((client_fd = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
        perror("socket failed");
        exit(EXIT_FAILURE);
    }

    memset(&server_addr, 0, sizeof(server_addr));
    server_addr.sin_family = AF_INET;
    server_addr.sin_port = htons(PORT);
    inet_aton(SERVER_IP, &server_addr.sin_addr);

    // 连接到服务器
    if (connect(client_fd, (struct sockaddr *)&server_addr, addr_len) == -1) {
        perror("connect failed");
        exit(EXIT_FAILURE);
    }

    // 发送数据
    send(client_fd, message, strlen(message), 0);

    printf("Message sent: %s\n", message);

    // 读取响应
    char response[1024];
    read(client_fd, response, sizeof(response));
    response[strcspn(response, "\n")] = '\0';

    printf("Response received: %s\n", response);

    // 关闭连接
    close(client_fd);

    return 0;
}

运行`server.c`作为服务器，`client.c`作为客户端，它们之间可以进行TCP通信。