# include <stdio.h>

int main ( )
{
  int a = 1;
  int *ap = &a;
  int b = 2;
  int *bp = &b;
  int c;
  int *cp = &c;
//
//  A, B and C are integers.
//  AP, BP, CP are the addresses of these integers in memory.
//
  printf ( "\n" );
  printf ( "Memory BEFORE c = a + b:\n" );
  printf ( "\n" );
  printf ( "  -----Location------  --Value----\n" );
  printf ( "  ap = %p  a = %i\n", ap, a );
  printf ( "  bp = %p  b = %i\n", bp, b );
  printf ( "  cp = %p  c = %i\n", cp, c );

  c = a + b;
  printf ( "\n" );
  printf ( "Memory AFTER c = a + b:\n" );
  printf ( "\n" );
  printf ( "  -----Location------  --Value----\n" );
  printf ( "  ap = %p  a = %i\n", ap, a );
  printf ( "  bp = %p  b = %i\n", bp, b );
  printf ( "  cp = %p  c = %i\n", cp, c );

  *ap = 10;
  *bp = 20;
  *cp = 35;
  printf ( "\n" );
  printf ( "Memory AFTER *ap = 10, *bp = 20, *cp = 35:\n" );
  printf ( "\n" );
  printf ( "  -----Location------  --Value----\n" );
  printf ( "  ap = %p  a = %i\n", ap, a );
  printf ( "  bp = %p  b = %i\n", bp, b );
  printf ( "  cp = %p  c = %i\n", cp, c );

  *cp = *ap + *bp;
  printf ( "\n" );
  printf ( "Memory AFTER *cp = *ap + *bp:\n" );
  printf ( "\n" );
  printf ( "  -----Location------  --Value----\n" );
  printf ( "  ap = %p  a = %i\n", ap, a );
  printf ( "  bp = %p  b = %i\n", bp, b );
  printf ( "  cp = %p  c = %i\n", cp, c );

  return 0;
}