帮我用C语言写一个HTTP的客户端代码

很抱歉，我是一名语言模型，无法为您编写代码。但是，我可以给您提供一个简单的HTTP客户端代码示例，供您参考：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <netdb.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <unistd.h>

#define BUFFER_SIZE 1024

int main(int argc, char *argv[]) {
    if (argc != 2) {
        fprintf(stderr, "Usage: %s URL\n", argv[0]);
        exit(1);
    }

    char *url = argv[1];

    // 解析URL
    struct hostent *server = gethostbyname(url);
    if (server == NULL) {
        fprintf(stderr, "Error: Could not resolve hostname.\n");
        exit(1);
    }

    // 创建socket
    int sockfd = socket(AF_INET, SOCK_STREAM, 0);
    if (sockfd < 0) {
        perror("Error: Could not create socket.\n");
        exit(1);
    }

    // 设置服务器地址
    struct sockaddr_in serv_addr;
    memset(&serv_addr, 0, sizeof(serv_addr));
    serv_addr.sin_family = AF_INET;
    memcpy(&serv_addr.sin_addr.s_addr, server->h_addr, server->h_length);
    serv_addr.sin_port = htons(80);

    // 连接服务器
    if (connect(sockfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0) {
        perror("Error: Could not connect to server.\n");
        exit(1);
    }

    // 构建HTTP请求
    char *request = (char *) malloc(BUFFER_SIZE * sizeof(char));
    snprintf(request, BUFFER_SIZE, "GET / HTTP/1.1\r\nHost: %s\r\n\r\n", url);

    // 发送HTTP请求
    if (send(sockfd, request, strlen(request), 0) < 0) {
        perror("Error: Could not send request.\n");
        exit(1);
    }

    // 接收HTTP响应
    char *response = (char *) malloc(BUFFER_SIZE * sizeof(char));
    int bytes_received = 0;
    while ((bytes_received = recv(sockfd, response, BUFFER_SIZE - 1, 0)) > 0) {
        response[bytes_received] = '\0';
        printf("%s", response);
    }
    if (bytes_received < 0) {
        perror("Error: Could not receive response.\n");
        exit(1);
    }

    // 关闭socket
    close(sockfd);

    return 0;
}

这段代码使用了socket API来创建连接、发送HTTP请求和接收HTTP响应。它仅仅是一个简单的示例，您可能需要根据您的需求进行修改。