Question 2) For each of the following, write C++ statements that perform the spe

Question

Question 2)    For each of the following, write C++ statements that perform the specified task. Assume that unsigned integers are stored in four bytes and that the starting address of the built-in array is at location 1002500 in memory.

a.      Declare an unsigned int built-in array values with five elements initialized to the even integers from 2 to 10. Assume that the constant size has been defined as 5.

b.      Declare a pointer vPtr that points to an object of type unsigned int.

c.       Use a for statement to display the elements of built-in array values using array subscript notation.

d.      Write two separate statements that assign the starting address of built-in array values to pointer variable vPtr.

e.      Use a for statement to display the elements of built-in array values using pointer/offset notation.

f.        Use a for statement to display the elements of built-in array values using pointer/offset notation with the built-in array’s name as the pointer.

g.      Use a for statement to display the elements of built-in array values by subscripting the pointer to the built-in array.

h.      Refer to the fifth element of values using array subscript notation, pointer/offset notation with the built-in array’s name as the pointer, pointer subscript notation and pointer/offset notation.

i.        What address is referenced by vPtr + 3? What value is stored at that location?

j.        Assuming that vPtr points to values[4], what address is referenced by vPtr -= 4? What value is stored at that location?

Explanation / Answer

2)

a)

int values[SIZE] = {2,4,6,8,10};

b)

int *vPtr;

c)

for(i=0;i<SIZE;i++)

printf("%d", values[i]);

d)

vPtr=values;

vPtr=&values[0];

e)

for(i=0;i<SIZE;i++)

printf("%d", *(vPtr+i));

f)

for(i=0;i<SIZE;i++)

printf("%d", *(values+i));

g)

for(i=0;i<SIZE;i++)

printf("%d ", vPtr[i]);

h)

array subscript notation: values[4]

pointer/offset notation: *(values +4)

pointer subscript notation: vPtr[4]

pointer/offset notation: *(vPtr + 4)

i)

1002512 is the address is referenced by vPtr + 3 and 8 is the value stored at that location.

j)

1002500 is the address referenced by vPtr -= 4 and 2 is stored at that location.

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