C语言网络编程：金融行业中的网络通信解决方案

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

// 服务器套接字
int server_sockfd;
// 客户端套接字
int client_sockfd;
// 客户端地址
struct sockaddr_in client_addr;

int main()
{
    // 创建服务器套接字
    server_sockfd = socket(AF_INET, SOCK_STREAM, 0);
    if (server_sockfd == -1) {
        perror("socket");
        exit(EXIT_FAILURE);
    }

    // 绑定服务器套接字到 IP 地址和端口
    struct sockaddr_in server_addr;
    memset(&server_addr, 0, sizeof(server_addr));
    server_addr.sin_family = AF_INET;
    server_addr.sin_port = htons(8080);
    server_addr.sin_addr.s_addr = htonl(INADDR_ANY);
    if (bind(server_sockfd, (struct sockaddr *)&server_addr, sizeof(server_addr)) == -1) {
        perror("bind");
        close(server_sockfd);
        exit(EXIT_FAILURE);
    }

    // 监听客户端连接
    if (listen(server_sockfd, 5) == -1) {
        perror("listen");
        close(server_sockfd);
        exit(EXIT_FAILURE);
    }

    while (1) {
        // 接受客户端连接
        socklen_t client_addr_len = sizeof(client_addr);
        client_sockfd = accept(server_sockfd, (struct sockaddr *)&client_addr, &client_addr_len);
        if (client_sockfd == -1) {
            perror("accept");
            continue;
        }

        // 发送股票报价给客户端
        char message[] = "股票报价数据";
        if (send(client_sockfd, message, strlen(message), 0) == -1) {
            perror("send");
            close(client_sockfd);
            continue;
        }

        // 关闭连接
        close(client_sockfd);
    }

    // 关闭服务器套接字
    close(server_sockfd);

    return EXIT_SUCCESS;
}

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

// 客户端套接字
int client_sockfd;

int main()
{
    // 创建客户端套接字
    client_sockfd = socket(AF_INET, SOCK_STREAM, 0);
    if (client_sockfd == -1) {
        perror("socket");
        exit(EXIT_FAILURE);
    }

    // 连接到服务器
    struct sockaddr_in server_addr;
    memset(&server_addr, 0, sizeof(server_addr));
    server_addr.sin_family = AF_INET;
    server_addr.sin_port = htons(8080);
    server_addr.sin_addr.s_addr = inet_addr("127.0.0.1");
    if (connect(client_sockfd, (struct sockaddr *)&server_addr, sizeof(server_addr)) == -1) {
        perror("connect");
        close(client_sockfd);
        exit(EXIT_FAILURE);
    }

    // 接收股票报价
    char buffer[1024];
    memset(buffer, 0, 1024);
    if (recv(client_sockfd, buffer, 1024, 0) == -1) {
        perror("recv");
        close(client_sockfd);
        exit(EXIT_FAILURE);
    }

    // 打印股票报价
    printf("%s\n", buffer);

    // 关闭连接
    close(client_sockfd);

    return EXIT_SUCCESS;
}