#include <iostream>#include <string>#include <leveldb/db.h>#include <boost/lexical_cast.hpp>using namespace std;int main(int argc, char *const *argv){    try    {        leveldb::DB* db;        leveldb::Options options;        options.create_if_missing = true;        leveldb::Status status = leveldb::DB::Open(options, "./db", &db);        cout << status.ok() << endl;        for(int i=0; i<99999; i++)        {            string key = boost::lexical_cast<string>(i);            string value = http://www.mamicode.com/boost::lexical_cast<string>(i*i);            db->Put(leveldb::WriteOptions(), key, value);        }        string key = "666";        string value;        db->Get(leveldb::ReadOptions(), key, &value);        cout << value << endl;        cout << 666*666 << endl;        delete db;    }    catch(exception &e)    {        cout << e.what() << endl;    }    return 0;}