#include "apue.h"#include "apue_db.h"#include <fcntl.h>intmain(void){	DBHANDLE	db;	if ((db = db_open("db4", O_RDWR | O_CREAT | O_TRUNC,	  FILE_MODE)) == NULL)		err_sys("db_open error");	if (db_store(db, "Alpha", "data1", DB_INSERT) != 0)		err_quit("db_store error for alpha");	if (db_store(db, "beta", "Data for beta", DB_INSERT) != 0)		err_quit("db_store error for beta");	if (db_store(db, "gamma", "record3", DB_INSERT) != 0)		err_quit("db_store error for gamma");	db_close(db);	exit(0);}