用c++写一个简单聊天程序-DPDK中文网

以下是一个简单的C++聊天程序，它使用套接字实现基本的客户端和服务器之间的通信：

服务器端代码：

#include <iostream>
#include <cstring>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <unistd.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};
    const char* hello = "Hello from server";

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

    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);

    if (bind(server_fd, (struct sockaddr*)&address, sizeof(address))<0) {
        perror("bind failed");
        exit(EXIT_FAILURE);
    }
    
    if (listen(server_fd, 3) < 0) {
        perror("listen");
        exit(EXIT_FAILURE);
    }
    
    if ((new_socket = accept(server_fd, (struct sockaddr*)&address,
                             (socklen_t*)&addrlen))<0) {
        perror("accept");
        exit(EXIT_FAILURE);
   }
   
   valread = read(new_socket , buffer, 1024);
   printf("%s\n",buffer );
   send(new_socket , hello , strlen(hello) , 0 );
   printf("Hello message sent\n");

   return 0;
}

客户端代码：

#include <iostream>
#include <cstring>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <unistd.h>

#define PORT 8080

int main(int argc, char const *argv[]) {
    int sock = 0, valread;
    struct sockaddr_in serv_addr;
    char buffer[1024] = {0};
    const char* hello = "Hello from client";

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

    serv_addr.sin_family = AF_INET;
    serv_addr.sin_port = htons(PORT);
    
    // Convert IPv4 and IPv6 addresses from text to binary form
    if(inet_pton(AF_INET, "127.0.0.1", &serv_addr.sin_addr)<=0) {
        printf("\nInvalid address/ Address not supported \n");
        return -1;
    }

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

    send(sock , hello , strlen(hello) , 0 );
    printf("Hello message sent\n");
   valread = read( sock , buffer, 1024);
   printf("%s\n",buffer );
   return 0;
}

这个程序中，服务器绑定到本地地址并监听连接。当有一个客户端连接时，服务器接收一个消息并回复“Hello from server”。客户端与服务器建立连接，发送“Hello from client”，并等待服务器的响应。

请注意，这只是一个简单的示例程序。在实际应用中，需要考虑许多其他因素，如安全性、错误处理和用户界面设计。