字符数组输出烫烫烫

可以使用以下代码实现：

#include <iostream>
#include <cstring>

int main() {
    char str[] = {'\xe7', '\83', '\xab', '\xe7', '\83', '\xab', '\xe7', '\83', '\xab', '\0'};
    std::cout << str << std::endl;
    return 0;
}

其中，字符数组 `str` 存储了烫烫烫三个汉字的 UTF-8 编码。使用 `std::cout` 输出即可得到烫烫烫的结果。

相关问题

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;
}

在Windows环境下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。

以下是一个简单的示例代码，它通过 socket 在 Windows 环境下发送接收二维字符串数组，并将其输出：

#include <stdio.h>
#include <stdlib.h>
#include <winsock2.h>

#pragma comment(lib, "ws2_32.lib") // 链接 ws2_32.dll 库

#define PORT 8888
#define MAX_BUFFER_SIZE 1024

int main() {
    WSADATA wsaData;
    SOCKET serverSocket, clientSocket;
    struct sockaddr_in serverAddr, clientAddr;
    int clientAddrLen = sizeof(clientAddr);
    char buffer[MAX_BUFFER_SIZE];
    char **stringArray;
    int i, j, rows, cols, len;

    if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0) {
        printf("WSAStartup failed.\n");
        return 1;
    }

    serverSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
    if (serverSocket == INVALID_SOCKET) {
        printf("Create socket failed.\n");
        return 1;
    }

    memset(&serverAddr, 0, sizeof(serverAddr));
    serverAddr.sin_family = AF_INET;
    serverAddr.sin_addr.s_addr = htonl(INADDR_ANY);
    serverAddr.sin_port = htons(PORT);

    if (bind(serverSocket, (struct sockaddr *)&serverAddr, sizeof(serverAddr)) == SOCKET_ERROR) {
        printf("Bind socket failed.\n");
        closesocket(serverSocket);
        return 1;
    }

    if (listen(serverSocket, 1) == SOCKET_ERROR) {
        printf("Listen socket failed.\n");
        closesocket(serverSocket);
        return 1;
    }

    printf("Server is listening on port %d...\n", PORT);

    clientSocket = accept(serverSocket, (struct sockaddr *)&clientAddr, &clientAddrLen);
    if (clientSocket == INVALID_SOCKET) {
        printf("Accept socket failed.\n");
        closesocket(serverSocket);
        return 1;
    }

    printf("Client connected.\n");

    // 接收行数和列数
    recv(clientSocket, buffer, MAX_BUFFER_SIZE, 0);
    sscanf(buffer, "%d%d", &rows, &cols);

    // 动态分配二维数组内存
    stringArray = (char **)malloc(rows * sizeof(char *));
    for (i = 0; i < rows; i++) {
        stringArray[i] = (char *)malloc(cols * sizeof(char));
    }

    // 接收二维数组数据
    for (i = 0; i < rows; i++) {
        recv(clientSocket, stringArray[i], cols, 0);
    }

    // 输出二维数组
    printf("Received 2D array:\n");
    for (i = 0; i < rows; i++) {
        for (j = 0; j < cols; j++) {
            printf("%c", stringArray[i][j]);
        }
        printf("\n");
    }

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

    closesocket(clientSocket);
    closesocket(serverSocket);
    WSACleanup();

    return 0;
}

在上面的代码中，我们通过 socket 建立了一个 TCP 服务器，并等待客户端的连接。客户端连接后，服务器会先接收一行字符串，其中包含了二维数组的行数和列数。然后服务器会动态分配内存来存储二维数组，并接收客户端发送的二维数组数据。最后服务器将二维数组输出，并释放内存。

下面是客户端的代码：

#include <stdio.h>
#include <stdlib.h>
#include <winsock2.h>

#pragma comment(lib, "ws2_32.lib") // 链接 ws2_32.dll 库

#define SERVER_IP "127.0.0.1"
#define PORT 8888
#define MAX_BUFFER_SIZE 1024

int main() {
    WSADATA wsaData;
    SOCKET clientSocket;
    struct sockaddr_in serverAddr;
    char buffer[MAX_BUFFER_SIZE];
    char **stringArray;
    int i, j, rows, cols, len;

    if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0) {
        printf("WSAStartup failed.\n");
        return 1;
    }

    clientSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
    if (clientSocket == INVALID_SOCKET) {
        printf("Create socket failed.\n");
        return 1;
    }

    memset(&serverAddr, 0, sizeof(serverAddr));
    serverAddr.sin_family = AF_INET;
    serverAddr.sin_addr.s_addr = inet_addr(SERVER_IP);
    serverAddr.sin_port = htons(PORT);

    if (connect(clientSocket, (struct sockaddr *)&serverAddr, sizeof(serverAddr)) == SOCKET_ERROR) {
        printf("Connect to server failed.\n");
        closesocket(clientSocket);
        return 1;
    }

    printf("Connected to server.\n");

    // 发送行数和列数
    rows = 3;
    cols = 4;
    sprintf(buffer, "%d %d", rows, cols);
    send(clientSocket, buffer, strlen(buffer), 0);

    // 动态分配二维数组内存
    stringArray = (char **)malloc(rows * sizeof(char *));
    for (i = 0; i < rows; i++) {
        stringArray[i] = (char *)malloc(cols * sizeof(char));
    }

    // 初始化二维数组
    for (i = 0; i < rows; i++) {
        for (j = 0; j < cols; j++) {
            stringArray[i][j] = 'a' + i * cols + j;
        }
    }

    // 发送二维数组数据
    for (i = 0; i < rows; i++) {
        send(clientSocket, stringArray[i], cols, 0);
    }

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

    closesocket(clientSocket);
    WSACleanup();

    return 0;
}

在上面的代码中，我们通过 socket 建立了一个 TCP 客户端，连接到了之前建立的服务器。客户端先发送一行字符串，其中包含了二维数组的行数和列数。然后客户端动态分配内存来存储二维数组，并初始化数组数据。最后客户端将二维数组数据发送给服务器，并释放内存。

注意，以上代码仅供参考，实际使用时还需要进行错误处理和防止缓冲区溢出等安全措施。