C语言网络编程中传递字符串时出错。

在C语言中，使用网络编程时需要特别关注字符串的处理。在传递字符串时，需要使用特定的函数来将其转换为网络字节序。以下示例代码展示了如何正确传递字符串：

#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 sockfd, connfd;
    struct sockaddr_in servaddr, cli;

    sockfd = socket(AF_INET, SOCK_STREAM, 0);
    if (sockfd == -1) {
        printf("Socket creation failed...\n");
        exit(0);
    }
    else {
        printf("Socket successfully created..\n");
    }
    bzero(&servaddr, sizeof(servaddr));

    servaddr.sin_family = AF_INET;
    servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
    servaddr.sin_port = htons(PORT);

    if ((bind(sockfd, (struct sockaddr*)&servaddr, sizeof(servaddr))) != 0) {
        printf("Socket binding failed...\n");
        exit(0);
    }
    else
        printf("Socket successfully bound..\n");

    if ((listen(sockfd, 5)) != 0) {
        printf("Listen failed...\n");
        exit(0);
    }
    else
        printf("Server listening..\n");

    socklen_t len = sizeof(cli);

    connfd = accept(sockfd, (struct sockaddr*)&cli, &len);
    if (connfd < 0) {
        printf("Server accepts connection failed...\n");
        exit(0);
    }
    else
        printf("Server accepts connection..\n");

    char buff[1024];
    int n;

    while (1) {
        bzero(buff, sizeof(buff));
        read(connfd, buff, sizeof(buff));
        printf("From client: %s\t To client : ", buff);
        bzero(buff, sizeof(buff));
        n = 0;

        while ((buff[n++] = getchar()) != '\n');

        write(connfd, buff, sizeof(buff));

        if (strncmp("exit", buff, 4) == 0) {
            printf