NTP 文件的存储 C IP 地址

#include <stdio.h>
#include <string.h>
#define NTP_TIME    "/etc/ambaipcam/IPC_Q313/config/NTPaddr.txt"

int main()
{
    FILE *NTPfp ;
    char szNTP[50][255],ntpjudge[100];
    char addr[255],addrbuf[255];    
    char NTPaddress[255];                                //-------------要改的NTP地址
    strcpy(NTPaddress,"192.168.1.139");
    int i,Lid=-1;
    int judge;
    memset(szNTP,0,sizeof(szNTP));
    strcpy(ntpjudge,"1");
            
    if((NTPfp=fopen(NTP_TIME,"r"))==NULL)
    {
        printf("can not open file!\n");
    }
    while(fgets(addr,256,NTPfp))
    {
         Lid++;
         memset(addrbuf,0,sizeof(addrbuf));
         if(strstr(addr,"NTP")!=NULL)                      //判断NTP是否打开
         {
             snprintf(addrbuf,sizeof(addrbuf)," NTP=%s\n",ntpjudge);
             strcpy(szNTP[Lid],addrbuf);            
         }
         else if(strstr(addr,"address")!=NULL)          //判断文件中哪一行是address
         {    
             snprintf(addrbuf,sizeof(addrbuf)," address=%s\n",NTPaddress);
             strcpy(szNTP[Lid],addrbuf);
         }
          else
             strcpy(szNTP[Lid],addr);
     }
     fclose(NTPfp);
                        
     if((NTPfp=fopen(NTP_TIME,"w"))==NULL)                //写入NTPaddr.txt
     {
          printf("can not open file!\n");
          return;
     }
     else
     {
         for(i=0;i<=Lid;i++)
         {
             fputs(szNTP[i],NTPfp);
         }
         fclose(NTPfp);
     }
     printf("ntpend=%s\n",szNTP[0]);
     printf("address=%s\n",szNTP[1]);
}