用c++中写出客户端和服务端代码利用udp协议引入txt文档进行机器人一问一答

以下是一个简单的基于UDP协议的客户端和服务器端代码示例，用于实现机器人一问一答：

客户端代码：

#include <iostream>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <string.h>

using namespace std;

int main() {
    int sockfd;
    struct sockaddr_in server_addr;

    // 创建socket
    if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
        perror("socket failed");
        exit(EXIT_FAILURE);
    }

    // 设置服务器地址
    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");

    // 发送数据
    char buffer[1024];
    cout << "请输入问题：" << endl;
    cin.getline(buffer, 1024);
    sendto(sockfd, buffer, strlen(buffer), 0, (struct sockaddr *) &server_addr, sizeof(server_addr));

    // 接收答案
    memset(buffer, 0, sizeof(buffer));
    socklen_t len = sizeof(server_addr);
    int n = recvfrom(sockfd, buffer, 1024, 0, (struct sockaddr *) &server_addr, &len);
    buffer[n] = '\0';
    cout << "答案：" << buffer << endl;

    close(sockfd);

    return 0;
}

服务器端代码：

#include <iostream>
#include <sys/socket.h>
#include <netinet/in.h>
#include <unistd.h>
#include <string.h>
#include <fstream>

using namespace std;

int main() {
    int sockfd;
    struct sockaddr_in server_addr, client_addr;

    // 创建socket
    if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
        perror("socket failed");
        exit(EXIT_FAILURE);
    }

    // 绑定端口号和IP地址
    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 = INADDR_ANY;
    if (bind(sockfd, (struct sockaddr *) &server_addr, sizeof(server_addr)) < 0) {
        perror("bind failed");
        exit(EXIT_FAILURE);
    }

    // 接收数据
    char buffer[1024];
    socklen_t len = sizeof(client_addr);
    int n = recvfrom(sockfd, buffer, 1024, 0, (struct sockaddr *) &client_addr, &len);
    buffer[n] = '\0';
    cout << "问题：" << buffer << endl;

    // 查找答案
    ifstream file("qa.txt");
    string question, answer;
    while (getline(file, question)) {
        getline(file, answer);
        if (question == buffer) {
            strcpy(buffer, answer.c_str());
            break;
        }
    }

    // 发送答案
    sendto(sockfd, buffer, strlen(buffer), 0, (struct sockaddr *) &client_addr, sizeof(client_addr));

    close(sockfd);

    return 0;
}

以上代码的机器人回答是根据本地的`qa.txt`文档中的内容进行查找和返回的。每行包含一个问题和一个答案，用冒号分隔。您可以根据自己的需求和业务逻辑进行修改。