dbt.h

数据库实验

#include <string>
 using namespace std;
class DBT
{
public:
	string data;
	int size;
	char *buff;// use for function of char*();


	DBT();
	~DBT();
	DBT(string& getdata,int& getsize);
	DBT(string& getdata);

	string getstring();
	int stringsize();
	int totalsize();
    
	
	DBT  operator=(DBT& object);
	DBT  operator=(string& object);
	friend ostream& operator<<(ostream& stream,DBT& object);
	friend istream& operator>>(istream& stream,DBT& object);
	int operator==(DBT& object);

	operator char*();
	




};