C++ 数据库操作

#include   
using namespace std;  
class DBHelper  
{  
public:  
    DBHelper()  
    {  
        cout<<"DB ..."<





()  
    {  
        return db_;  
    }  
private:  
    DBHelper* db_;  
};  
int main(void)  
{  
    DB db;  
    db->Open();//db operaot->().Open()  
    db->Query();  
    db->Close();  
    return 0;  
}