使用c++编写一个udp server和udp client

UDP Server:

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

#define BUF_SIZE 1024
#define PORT 8888

int main()
{
    int sockfd;
    struct sockaddr_in server_addr, client_addr;
    socklen_t client_len;
    char buf[BUF_SIZE];

    bzero(&server_addr, sizeof(server_addr));
    server_addr.sin_family = AF_INET;
    server_addr.sin_addr.s_addr = htonl(INADDR_ANY);
    server_addr.sin_port = htons(PORT);

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

    if (bind(sockfd, (struct sockaddr *)&server_addr, sizeof(server_addr)) < 0) {
        perror("bind");
        exit(EXIT_FAILURE);
    }

    while (1) {
        memset(buf, 0, BUF_SIZE);
        client_len = sizeof(client_addr);
        if (recvfrom(sockfd, buf, BUF_SIZE, 0, (struct sockaddr *)&client_addr, &client_len) < 0) {
            perror("recvfrom");
            continue;
        }
        printf("Received message from %s:%d: %s\n", inet_ntoa(client_addr.sin_addr), ntohs(client_addr.sin_port), buf);
    }

    close(sockfd);
    return 0;
}

UDP Client:

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

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

int main()
{
    int sockfd;
    struct sockaddr_in server_addr;
    char buf[BUF_SIZE];

    bzero(&server_addr, sizeof(server_addr));
    server_addr.sin_family = AF_INET;
    server_addr.sin_addr.s_addr = inet_addr(SERVER_IP);
    server_addr.sin_port = htons(PORT);

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

    while (1) {
        printf("Enter message: ");
        fgets(buf, BUF_SIZE, stdin);
        if (sendto(sockfd, buf, strlen(buf), 0, (struct sockaddr *)&server_addr, sizeof(server_addr)) < 0) {
            perror("sendto");
            continue;
        }
        printf("Sent message to server: %s\n", buf);
    }

    close(sockfd);
    return 0;
}