데이터 개체 길이
: 1!
class T{
private:
int a;
};
class T1
{
};
cout<<"sizeof(class T)"<<sizeof(T)<<endl; //
cout<<"sizeof(class T1)"<<sizeof(T1)<<endl;
char* pstr="helloworld";
cout<<sizeof(pstr)<<endl;//4
cout<<strlen(pstr)<<endl;//10