I have a question..!!

I wonder that it is possible to store severl data under one key. for example:
(key) : (data)
fruit = apple,orange,banada
vegetalbe = carot,onion,
...
....
and above source is just for storing data.Therefore if I want to make a program for just reading berkeley db data, how can I make it ? I made following these sources but it doesn't work. That is,i want to make two program Data is stored by input.c and data is read by reading.c

== input.c ===
#include <stdio.h>
#include <sys/types.h>
#include <stdio.h>
#include <db.h>
#define DATABASE "access.db"
#define SSIZE 256
typedef struct _content{
   char RE[SSIZE];
   char REURL[SSIZE];
   char ACCEL[SSIZE];
} CONTENT;
CONTENT content;
static char* _cpBase64Encoding =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
void Base64Encode( char* cpInput, char* cpOutput )
{
int nIdx[ 4 ];  
while ( '\0' != *cpInput )
{
  nIdx[0] = ((*cpInput) & 0xFC)>>2;
  nIdx[1] = ((*cpInput) & 0x03)<<4;
  cpInput++;
  if ( '\0' != *cpInput )
  {
    nIdx[1] |= ((*cpInput) & 0xF0)>>4;
    nIdx[2]  = ((*cpInput) & 0x0F)<<2;
    cpInput++;
    if ( '\0' != (*cpInput) )
    {
      nIdx[2] |= ((*cpInput) & 0xC0) >> 6;
      nIdx[3]  = (*cpInput) & 0x3F;
      cpInput++;
    }
    else
      nIdx[3] = 64;
  }
  else
  {
    nIdx[2] = 64;
    nIdx[3] = 64;
  }

  *(cpOutput+0) = *(_cpBase64Encoding + nIdx[0]);
  *(cpOutput+1) = *(_cpBase64Encoding + nIdx[1]);
  *(cpOutput+2) = *(_cpBase64Encoding + nIdx[2]);
  *(cpOutput+3) = *(_cpBase64Encoding + nIdx[3]);
  cpOutput += 4;
}

*cpOutput = '\0';

return;
}
int main (){
     FILE *fp;
     DB *dbp;
     DBT key,data;
     int ret,t_ret;
     int size=600;
     char buf[size];
     char sNonCoded[256];
     char ssNonCoded[256];
     char sssNonCoded[256];
     char ssssNonCoded[256];
     char sEncoded[256];
     char ssEncoded[256];
     char sssEncoded[256];
     char ssssEncoded[256];
     char regex[6];
     char redirect[512];
     char redirect_url[512];
     char accel[512];
     //Read data
     if((fp=fopen("2.txt","rt")) ==  NULL){
          printf("Error: Cannot open data file\n");
          return(1);
     }
       // Create Berkeley DB
     if ((ret = db_create(&dbp, NULL, 0)) != 0) {
          fprintf(stderr, "db_create: %s\n", db_strerror(ret));
          exit (1);
     }
     if ((ret = dbp->open(
         dbp, DATABASE, NULL, DB_BTREE, DB_CREATE, 0664)) != 0) {
          dbp->err(dbp, ret, "%s", DATABASE);
          goto err;
     }

 while(fgets(buf,size-1,fp)){
     sscanf(buf,"%6s %512s %512s %512s",regex,redirect,redirect_url,accel);
     strcpy(sNonCoded,regex);
     strcpy(ssNonCoded,redirect);
     strcpy(sssNonCoded,redirect_url);
     strcpy(ssssNonCoded,accel);
     Base64Encode( sNonCoded, sEncoded );
     Base64Encode( ssNonCoded, ssEncoded );
     Base64Encode( sssNonCoded, sssEncoded );
     Base64Encode( ssssNonCoded, ssssEncoded);
     memset(&key,0,sizeof(key));
     memset(&data,0,sizeof(data));
     key.data = sEncoded;
     key.size = sizeof(sEncoded);
     strncpy(content.RE,ssEncoded,SSIZE);
     strncpy(content.REURL,sssEncoded,SSIZE);
     strncpy(content.ACCEL,ssssEncoded,SSIZE);
     data.data = (char *)&content;
     data.size = sizeof(CONTENT);
     if ((ret = dbp->put(dbp,NULL,&key,&data,0))==0){
          printf("db: %s: field 1 stored.\n",(char *)key.data);
          printf("db: %s: field 2 stored.\n",content.RE);
          printf("db: %s: field 3  stored.\n",content.REURL);
          printf("db: %s: field 4  stored.\n",content.ACCEL);
     }else{
          printf("Error");
          dbp->err(dbp,ret,"DB->put");
          goto err;
     }


 }
 err: if ((t_ret = dbp->close(dbp, 0)) != 0 && ret == 0)
             ret = t_ret;
             exit(ret);
}




== reading.c =====
#include <stdio.h>
#include <sys/types.h>
#include <stdio.h>
#include <db.h>
#define DATABASE "access.db"
#define SSIZE 256
typedef struct _content{
   char RE[SSIZE];
   char REURL[SSIZE];
   char ACCEL[SSIZE];
} CONTENT;
CONTENT content;

int main (){
     FILE *fp;
     DB *dbp;
     DBT key,data;
     int ret,t_ret,i=0;
     char sNonCoded[256];
     char rkey[1000 + 1], *retaddr;
   // Create Berkeley DB
     if ((ret = db_create(&dbp, NULL, 0)) != 0) {
          fprintf(stderr, "db_create: %s\n", db_strerror(ret));
          exit (1);
     }
     if ((ret = dbp->open(
         dbp, DATABASE, NULL, DB_BTREE, DB_CREATE, 0664)) != 0) {
          dbp->err(dbp, ret, "%s", DATABASE);
          goto err;
     }

 while((ret = dbp->get(dbp, NULL, &key, &data, 0)) != 0){
     printf("%d\n",i);
     memset(&key,0,sizeof(key));
     memset(&data,0,sizeof(data));
     key.data = rkey;
     key.size = sizeof(rkey);
     data.data = (char *)&content;
     data.size = sizeof(CONTENT);
     printf( "Decoded(field 1): %s\n", (char *)key.data );
     printf( "Decoded(field 2): %s\n",((CONTENT *)(data.data))->RE);
     printf( "Decoded(field 2): %s\n", ((CONTENT *)(data.data))->REURL);          
     printf( "Decoded(field 2): %s\n\n", ((CONTENT *)(data.data))->ACCEL);
     i++;
     if ( i == 20) {
          exit(1);
     }
 }
 err: if ((t_ret = dbp->close(dbp, 0)) != 0 && ret == 0)
             ret = t_ret;
 exit(ret);
}

data are :
AAAA    http://www.zzz.zzz   http://myhome http://www.zzz.*aaa
AAAi    http://www.bbb.zzz   http://myhome http://www.zzz.*aaa
AAAA    http://www.zzz.zzz   http://myhome http://www.zzz.*aaa
AAAA    http://www.ccc.zzz   http://myhome http://www.zzz.*aaa
AAAi    http://www.zzz.zzz   http://myhome http://www.zzz.*aaa
AAAA    http://www.ddd.zzz   http://myhome http://www.zzz.*aaa


I apprecate of your help..!!