C语言通过socket发送接收二维字符串数组，二维字符串数组长度不确定，并将二维字符串数组输出，给出具体代码。

以下是一个示例代码，可以通过socket发送接收二维字符串数组，并将其输出：

#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 server_fd, new_socket, valread;
    struct sockaddr_in address;
    int opt = 1;
    int addrlen = sizeof(address);
    char buffer[1024] = {0};
    char *hello = "Hello from server";
    char **str_array = NULL;  // 二维字符串数组
    int rows = 0;             // 二维数组的行数

    // 创建socket
    if ((server_fd = socket(AF_INET, SOCK_STREAM, 0)) == 0) {
        perror("socket failed");
        exit(EXIT_FAILURE);
    }

    // 设置socket选项
    if (setsockopt(server_fd, SOL_SOCKET, SO_REUSEADDR | SO_REUSEPORT,
                   &opt, sizeof(opt))) {
        perror("setsockopt");
        exit(EXIT_FAILURE);
    }
    address.sin_family = AF_INET;
    address.sin_addr.s_addr = INADDR_ANY;
    address.sin_port = htons(PORT);

    // 绑定socket
    if (bind(server_fd, (struct sockaddr *)&address,
             sizeof(address)) < 0) {
        perror("bind failed");
        exit(EXIT_FAILURE);
    }

    // 监听socket
    if (listen(server_fd, 3) < 0) {
        perror("listen");
        exit(EXIT_FAILURE);
    }

    // 接收客户端连接
    if ((new_socket = accept(server_fd, (struct sockaddr *)&address,
                             (socklen_t *)&addrlen)) < 0) {
        perror("accept");
        exit(EXIT_FAILURE);
    }

    // 接收二维字符串数组的行数
    if ((valread = read(new_socket, buffer, 1024)) < 0) {
        perror("read");
        exit(EXIT_FAILURE);
    }
    sscanf(buffer, "%d", &rows);  // 将字符串转换为整数

    // 动态分配二维字符串数组
    str_array = (char **)malloc(rows * sizeof(char *));
    for (int i = 0; i < rows; i++) {
        str_array[i] = (char *)malloc(1024 * sizeof(char));
    }

    // 接收二维字符串数组的内容
    for (int i = 0; i < rows; i++) {
        if ((valread = read(new_socket, str_array[i], 1024)) < 0) {
            perror("read");
            exit(EXIT_FAILURE);
        }
    }

    // 输出二维字符串数组
    printf("Received string array:\n");
    for (int i = 0; i < rows; i++) {
        printf("%s\n", str_array[i]);
    }

    // 发送响应
    send(new_socket, hello, strlen(hello), 0);
    printf("Hello message sent\n");

    // 释放内存
    for (int i = 0; i < rows; i++) {
        free(str_array[i]);
    }
    free(str_array);

    return 0;
}

客户端代码如下：

#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 sock = 0, valread;
    struct sockaddr_in serv_addr;
    char *hello = "Hello from client";
    char **str_array = NULL;  // 二维字符串数组
    int rows = 3;             // 二维数组的行数

    // 动态分配二维字符串数组
    str_array = (char **)malloc(rows * sizeof(char *));
    for (int i = 0; i < rows; i++) {
        str_array[i] = (char *)malloc(1024 * sizeof(char));
        sprintf(str_array[i], "String%d", i+1);  // 生成测试数据
    }

    // 创建socket
    if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
        printf("\n Socket creation error \n");
        return -1;
    }

    memset(&serv_addr, '0', sizeof(serv_addr));

    serv_addr.sin_family = AF_INET;
    serv_addr.sin_port = htons(PORT);

    // 将IP地址转换为网络字节序
    if (inet_pton(AF_INET, "127.0.0.1", &serv_addr.sin_addr) <= 0) {
        printf("\nInvalid address/ Address not supported \n");
        return -1;
    }

    // 连接服务器
    if (connect(sock, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) < 0) {
        printf("\nConnection Failed \n");
        return -1;
    }

    // 发送二维字符串数组的行数
    char rows_str[10];
    sprintf(rows_str, "%d", rows);
    send(sock, rows_str, strlen(rows_str), 0);

    // 发送二维字符串数组的内容
    for (int i = 0; i < rows; i++) {
        send(sock, str_array[i], strlen(str_array[i]), 0);
    }

    // 接收响应
    char buffer[1024] = {0};
    if ((valread = read(sock, buffer, 1024)) < 0) {
        perror("read");
        exit(EXIT_FAILURE);
    }
    printf("%s\n", buffer);

    // 释放内存
    for (int i = 0; i < rows; i++) {
        free(str_array[i]);
    }
    free(str_array);

    return 0;
}