#include <stdio.h>

int f1(int w);

int f2(int *x);

void f3(int **y, int *z);


int main(void)
{
  int i = 95, j = -16;
  int *ptr_2_i, **ptr_2_ptr_2_i;

  ptr_2_i = &i;
  ptr_2_ptr_2_i = &ptr_2_i;
/** Assume the following addresses have been assigned
    A1   i
    A2   j
    A3   ptr_2_i
    A4   ptr_2_ptr_2_i;
**/
 
/**What are the values of the following at this point
   i
   j
   ptr_2_i
   ptr_2_ptr_2_i
   *ptr_2_i
   *ptr_2_ptr_2_i
   **ptr_2ptr_2_i
**/ 

  printf("\n%d, %d ", f1(i), f2(ptr_2_i));
  f3(ptr_2_ptr_2_i, &j);
  
  printf("\n%d, %d\n", **ptr_2_ptr_2_i, *ptr_2_i);
  printf("%d\n", f2(ptr_2_i));

/**What are the values of the following at this point
   i
   j
   ptr_2_i
   ptr_2_ptr_2_i
   *ptr_2_i
   *ptr_2_ptr_2_i
   **ptr_2ptr_2_i
**/ 

  return 0;
}


int f1(int w)
{
  return w;
}


int f2(int *x)
{
  return (*x);

/** Assume C1 is given to x as an address **/
/** What is the value of each of the following at this point

  &x
  x
  *x

**/ 
}



void f3(int **y, int *z)
{
  *y = z;

/** Assume C4 is given to y and C5 is given to z as addresses **/
/** What is the value of each of the following at this point

  &y
  &z
  y
  z
  *y
  *z
  **y

**/
}

Address     Name      Value
---------------------------
A1      i               95
A2      j              -16
A3      ptr_2_i         A1
A4      prt_2_ptr_2_i   A3



Values are
i = 95
j = -16
ptr_2_i = A1
ptr_2_ptr_2_i A3
*ptr_2_i = 95 (what is stored in location A1) (dereference value of ptr_2_i)
*ptr_2_ptr_2_i = A1 (what is stored in location A3)(dereference value of
                                                    ptr_2_ptr_2_i)
**ptr_2_ptr_2_i = 95 (what is stored in the location A1) (dereference value
                               of ptr_2_ptr_2_i TWICE)
 
Address   Name   Value
C1         x      A1 (value stored in ptr_2_i for first call)
                  A2 (value stored in ptr_2_i for second call)


Values for first call (assumes C1 assigned as address for both calls)

&x = C1
x =  A1 
*x = 95

Values for second call (assumes C1 assigned as address for both calls)

&x = C1
x =  A2 
*x = -16


Address      Name      Value
C4            y         A3 (value of ptr_2_ptr_2_i)(Address of ptr_2_i)
C5            z         A2 (address of j)


Value
&y = C4
&z = C5
y = A3
z = A2
*y = A1 (the value stored in A3)
*z = -16 (the value stored in A2)
**y = 95 (the value stored in A1) (double dereference)