get.c~

这是我用QT和TTS写的一个电话本管理系统

//select data to test
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <db.h>
#define	DATABASE "demo.db"
int main()
{	DB *dbp;
	DBT key, data;
	int ret;
	if ((ret = db_create(&dbp, NULL, 0)) != 0)
	{
		fprintf(stderr, "db_create: %s\n", db_strerror(ret));
		exit (1);
	}
	if ((ret = dbp->open(dbp,NULL, DATABASE, NULL, DB_BTREE, DB_CREATE, 0664)) != 0) 
	{
		dbp->err(dbp, ret, "%s", DATABASE);
		exit (1);
	}
	memset(&key, 0, sizeof(key));
	memset(&data, 0, sizeof(data));
	key.data = "name";
	key.size = sizeof("name");
	if ((ret = dbp->get(dbp, NULL, &key, &data, 0)) == 0)
		printf("db: %s: key retrieved: data was %s.\n",(char *)key.data, (char *)data.data);
	else
		dbp->err(dbp, ret, "DB->get");
	if(dbp != NULL)
    		dbp->close(dbp, 0);  
}