#include <iostream.h> 
double pi = 3.14159;
class cylinder {
  public:
    double radius, length;
    double volume ( ) {return pi * radius * radius * length;}
};
main ( ) {
  cout << "Data Type            Bytes" << endl
       << "double               " << sizeof(double) << endl
       << "cylinder             " << sizeof(cylinder) << endl
       << "cylinder pointer     " << sizeof(cylinder*) << endl;
}