如何判断地址中的内容非法!
class Tag
{
public:
int a;
int b;
public:
Tag()
{
a = 2;
b = 1;
}
};
Tag *ptagb = new Tag();
Tag *pTagc = NULL;
DWORD dwAdda = (DWORD)ptagb;
pTagc = (Tag *)(dwAdda);
delete ptagb;
DWORD dwAddb = (DWORD)ptagb;
Tag *pTaga = (Tag *)(dwAddb);//在此如何判断地址中的内容非法!