tcp client, server chat simplified

Here is my simplified version of the tcp client, server chat application

client.c

#include "stdio.h"
#include "stdlib.h"
#include "sys/types.h"
#include "sys/socket.h"
#include "arpa/inet.h"

int main() {
    int sockfd,n;
    char buff[256];
    struct sockaddr_in servaddr;

    //create socket
    sockfd = socket(AF_INET,SOCK_STREAM,0);

    //fill serv struct
    servaddr.sin_family = AF_INET;
    servaddr.sin_port = htons(40402);
    servaddr.sin_addr.s_addr = inet_addr("127.0.0.1");    //connect with server
    connect(sockfd,(struct sockaddr*)&servaddr,sizeof(servaddr));

    //read and write with the server
    for(;;) {
    printf("client : ");
    n=0;
    while((buff[n++]=getchar())!='\n');
    write(sockfd,buff,sizeof(buff));
    bzero(buff,sizeof(buff)); //clearing the buffer
    read(sockfd,buff,sizeof(buff));
    printf("server : %s",buff);
    bzero(buff,sizeof(buff));
    }

    //close
    close(sockfd);
}

server.c

#include "stdio.h"
#include "stdlib.h"
#include "sys/types.h"
#include "sys/socket.h"
#include "arpa/inet.h"

int main() {
    int sockfd,connfd,n;
    char buff[256];
    struct sockaddr_in servaddr;

    //create socket
    sockfd = socket(AF_INET,SOCK_STREAM,0);

    //fill server struct
    servaddr.sin_family = AF_INET;
    servaddr.sin_port = htons(40402);
    servaddr.sin_addr.s_addr = inet_addr("127.0.0.1");

    //bind
    bind(sockfd,(struct sockaddr*)&servaddr,sizeof(servaddr));

    //listen for 1 connection
    listen(sockfd,1);
    
    //accept a client
    connfd = accept(sockfd,NULL,NULL);

    //read and write to client
    for(;;)  {
   read(connfd,buff,sizeof(buff));
   printf("client : %s",buff);
   bzero(buff,sizeof(buff));
   printf("server : ");
   n=0;
   while((buff[n++]=getchar())!='\n');
   write(connfd,buff,sizeof(buff));
   bzero(buff,sizeof(buff));
  }

    //close the sockets
    close(connfd);
    close(sockfd);

}