#include <iostream>
using namespace std;

void main()
{
  bool b;
  char c;
  int n;
  long l;
  float f;
  double d;

  cout << "sizeof a bool = " << sizeof b << endl;
  cout << "sizeof a char = " << sizeof c << endl;
  cout << "sizeof a int = " << sizeof n << endl;
  cout << "sizeof a long = " << sizeof l << endl;
  cout << "sizeof a float = " << sizeof f << endl;
  cout << "sizeof a double = " << sizeof d << endl;
  cout << endl << endl;

  cout.setf(ios::hex);      //show decimals as hex
  cout.unsetf(ios::dec);

  cout << "address of bool = " << &b << endl;
  cout << "address of char = " << &c << endl;
  cout << "address of int = " << &n << endl;
  cout << "address of long = " << &l << endl;
  cout << "address of float = " << &f << endl;
  cout << "address of double = " << &d << endl << endl;

  system("pause");
}


The output:

sizeof a bool = 1
sizeof a char = 1
sizeof a int = 4
sizeof a long = 4
sizeof a float = 4
sizeof a double = 8


address of bool = 12ff8b
address of char =
address of int = 12ff84
address of long = 12ff80
address of float = 12ff7c
address of double = 12ff74

Press any key to continue . . .