how to read a fields of a struct from file

[liyankka]

The following code writes into the file but is unable to retrieve fields of the struct
conf_record in the printf (after fread within while loop) statement.Please give a solution.

/* record.h */
typedef struct conf_record{
char * source_IP;
char * dest_IP;
char* s_port;
char* d_port;
//char** range_allow;//[2];
char* range_disallow[2];
}Record;

/* main.c */
#include <stdio.h>
#include <errno.h>
#include "record.h"
int main()
{
FILE * f1,*f2;
Record record,record1;
int i;
void *buff;

f1=fopen("./conf.txt","a");
if(f1!=NULL)
{
do{
printf("\nenter source_IP and dest_IP \n");
scanf("%s%s",&(record.source_IP),&(record.dest_IP) );
printf("\nenter source_port and dest_port\n");
scanf("%s%s",&(record.s_port),&(record.d_port));
printf("\nenter start and end time of restricted period\n");
scanf("%s%s",&(record.range_disallow[0]),&(record.range_disallow[1]));

buff=&record;
fwrite(buff,sizeof(Record),1,f1);
fflush(f1);
printf("\n more records? say 1 or 0 for yes /no:");
scanf("%d",&i);
}while(i==1);
fclose(f1);
}

f2=fopen("conf.txt","r");
if(f2!=NULL)
{ //reading not taking place!!!!!!
while(fread(buff,sizeof(Record),1,f2)>0)
{
record1=*((Record*)buff);
printf("%s %s %s %s",record1.source_IP,record1.dest_IP,record1.s_po rt,record1.d_port);
}
fclose(f2);
}
return 0;
}

[bartonc]

Hi liyankka. I see that you have found the x Forum. There is also a C++/C Forum here on TheScripts.com. I'm hopeful that they will be able to help you with this question if you post again, there.

Thanks for joining.