Using the & operator : Variable Address « Language « C Tutorial

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2. Language
3. Variable Address

#include<stdio.h>

int main(void)
{
  long a = 1L;
  long b = 2L;
  long c = 3L;

  double d = 4.0;
  double e = 5.0;
  double f = 6.0;

  printf("A variable of type long occupies %d bytes.", sizeof(long));
  printf("\nHere are the addresses of some variables of type long:");
  printf("\nThe address of a is: %p  The address of b is: %p", &a, &b);
  printf("\nThe address of c is: %p", &c);
  printf("\n\nA variable of type double occupies %d bytes.", sizeof(double));
  printf("\nHere are the addresses of some variables of type double:");
  printf("\nThe address of d is: %p  The address of e is: %p", &d, &e);
  printf("\nThe address of f is: %p\n", &f);
  return 0;
}

A variable of type long occupies 4 bytes.
     Here are the addresses of some variables of type long:
     The address of a is: 9a57c  The address of b is: 9a578
     The address of c is: 9a574
     
     A variable of type double occupies 8 bytes.
     Here are the addresses of some variables of type double:
     The address of d is: 9a568  The address of e is: 9a560
     The address of f is: 9a558