If语句不循环

我昨天有这个工作，由于某种原因它已经停止了，我要做的是当用户键入命令"ADD"后跟名字，姓氏和电话号码时，它将其附加到文件中。工作的是，在命令执行后，它会让我再次输入"ADD"fname, lname, phone，并增加计数器，将所有这些写入文件，它会让我这样做，直到我手动终止程序，每个条目都将在文本文件中。现在它将不止一次地接受该命令，但是它只会将我键入的第一个条目写入文件。

有人能发现我错过了什么吗?

"server.c" [dos] 200L, 5323Cc
/*
 * server.c
 */
#include <stdio.h>
#include <iostream>
#include <strings.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <cstring>
#include <cstdlib>
#include <string>
#include <sstream>
using namespace std;
#define SERVER_PORT 1617
#define MAX_PENDING 5
#define MAX_LINE 512
int
main (int argc, char **argv)
{
struct sockaddr_in sin;
socklen_t addrlen;

char buf[MAX_LINE];
int len;
int s;
int new_s;
int r = 1000;
int result;
char message;
FILE *file_ptr;
string cmd, fn, ln, ph;
string add = "ADD";
string del = "DELETE";
string list = "LIST";
string quite = "QUIT";
string shutdown = "SHUTDOWN";

/* build address data structure */
bzero ((char *) &sin, sizeof (sin));
sin.sin_family = AF_INET;
sin.sin_addr.s_addr = INADDR_ANY;
sin.sin_port = htons (SERVER_PORT);
/* setup passive open */
if ((s = socket (AF_INET, SOCK_STREAM, 0)) < 0)
 {
  perror ("socket");
  exit (1);
}
if ((bind (s, (struct sockaddr *) &sin, sizeof (sin))) < 0)
{
  perror ("bind");
  exit (1);
}
listen (s, MAX_PENDING);
addrlen = sizeof (sin);
cout << "The server is up, waiting for connection" << endl;

  /* wait for connection, then receive and print text */
while (1)
{
  if ((new_s = accept (s, (struct sockaddr *) &sin, &addrlen)) < 0)
    { 
      perror ("accept");
      exit (1);
    }
  cout << "new connection from " << inet_ntoa (sin.sin_addr) << endl;
  while (len = recv (new_s, buf, sizeof (buf), 0))
    {
      /*send (new_s, buf, strlen(buf) + 1, 0);  original send to echo in client */
    /* create string stream from contents of buffer */
      stringstream stream (buf);
    /* read user input from string stream into strings for user input */
      stream >> cmd;
      stream >> fn;
      stream >> ln;
      stream >> ph;

  /* create character arrays and copy strings into character arrays */
      char command[9] = "        ";
      char fname[9] = "        ";
      char lname[9] = "        ";
      char phone[13] = "            ";
      cmd.copy (command, 8);
      fn.copy (fname, 8);
      ln.copy (lname, 8);
      ph.copy (phone, 12);


 /* determine if valid command received */
      /* Adds whatever follows the word "ADD" to the text file" */
      if (cmd.compare (add) == 0){
     {
          file_ptr = fopen ("file1.txt", "a+");
          fprintf (file_ptr, "%d" "%s" "%s" "%s" "%s", r, " ", fname,
                   lname, phone);
          fprintf (file_ptr, "n");
          fclose(file_ptr);
          ++r;
        }
    }
/* LIST user input */
      else if (cmd.compare (list) == 0)
        {
          file_ptr = fopen ("file1.txt", "r");
          size_t count;
          while ((count = fread (buf, 1, sizeof buf, file_ptr)) > 0)
            {
              send (new_s, buf, count, 0);
              fclose (file_ptr);
            }
        }
      else if (cmd.compare (del) == 0)      /*Delete user input */
        {
          {
            FILE *fp1, *fp2;
            /*consider 40 character string to store filename */
            char filename[40];
            char c;
            int del_line, temp = 1;
            fp1 = fopen ("file1.txt", "r");
            c = getc (fp1);
            while (c != EOF)
              {
                printf ("%c", c);
                /*print current character and read next character */
                c = getc (fp1);
              }
            rewind (fp1);
            printf (" n Enter line number of the line to be deleted:");
            /*accept number from user. */
            scanf ("%d", &del_line);

            fp2 = fopen ("copy.c", "w");
            c = getc (fp1);
            while (c != EOF)
              {
                c = getc (fp1);
                if (c == 'n')
                  temp++;

                if (temp != del_line)
                  {
                    /*copy all lines in file copy.c */
                    putc (c, fp2);
                  }
              }
            fclose (fp1);
            fclose (fp2);
            /*remove original file */
            remove ("file1.txt");
            /*rename the file copy.c to original name */
            rename ("copy.c", "file1.txt");
            printf
              ("n The contents of file after being modified are as  follows:n");
            fp1 = fopen ("file1.txt", "r");
            c = getc (fp1);
            while (c != EOF)
              {
                printf ("%c", c);
                c = getc (fp1);
              }
            fclose (fp1);
          }
        }
      else
        {
          cout << "Invalid Command" << endl;
        }
    }
  close (new_s);
}
}