#include <iostream>
using namespace std;

struct Date{
 int day;
 int month;
 int year;
 Date* ptr;
};

int main()
{
   cout << sizeof(int*);
   cout << sizeof(double*);
   cout << sizeof(char*);
   cout << sizeof(void*);
   cout << endl;
   cout << sizeof(Date);
   int* ptr = new int;
   *ptr=5;
   cout <<endl<< *ptr <<endl;
   void* badptr = ptr; 
   int* real_bad =(int*) badptr;
   cout <<endl<< *real_bad;
}