/* File: ptr_add.c
   
   Pointer addition is not what you think 
*/

#include <stdio.h>

main(){

char	c, *p1 ;
int	i, *p2 ;
double	f, *p3 ;

  p1 = &c ;
  p2 = &i ;
  p3 = &f ;

  printf("\nThe addresses of c, i and f are:\n") ;
  printf("p1 = %d,  p2 = %d,  p3 = %d\n", p1, p2, p3) ;

  p1 = p1 + 1 ; 
  p2 = p2 + 1 ; 
  p3 = p3 + 1 ; 

  printf("\nThe new values of p1, p2 and p3 are:\n") ;
  printf("p1 = %d,  p2 = %d,  p3 = %d\n\n", p1, p2, p3) ;

  printf("Sizeof char = %d\n", sizeof(char) ) ;
  printf("Sizeof int = %d\n", sizeof(int) ) ;
  printf("Sizeof double = %d\n", sizeof(double) ) ;
}

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The addresses of c, i and f are:
p1 = 2147469143,  p2 = 2147469132,  p3 = 2147469120

The new values of p1, p2 and p3 are:
p1 = 2147469144,  p2 = 2147469136,  p3 = 2147469128

Sizeof char = 1
Sizeof int = 4
Sizeof double = 8