For each of the following, write C++ statements that perform the specified task. Assume that double-precision, floating-point numbers are stored in eight bytes and that the starting address of the built-in array is at location 1002500 in memory. Each part of the exercise should use the re- sults of previous parts where appropriate.

Question

a) Use a for statement to display the elements of built-in array numbers using pointer/off- set notation with the built-in array’s name as the pointer.
b) Use a for statement to display the elements of built-in array numbers using pointer/sub- script notation with pointer nPtr.
c) Refer to the fourth element of built-in array numbers using array subscript notation, pointer/offset notation with the built-in array’s name as the pointer, pointer subscript notation with nPtr and pointer/offset notation with nPtr.
d) Assuming that nPtr points to the beginning of built-in array numbers, what address is referenced by nPtr + 8? What value is stored at that location?
e) Assuming that nPtr points to numbers[5], what address is referenced by nPtr after nPtr
-= 4 is executed? What’s the value stored at that location?

Answer 1

```
a) cout << fixed << showpoint << setprecision(1);
for (size_t k{0}; k < size; ++k) {
cout << *(numbers + k) << ' ';
}
b) cout << fixed << showpoint << setprecision(1);
for (size_t m{0}; m < size; ++m) {
cout << nPtr[m] << ' ';
}
c) numbers[3]
*(numbers + 3)
nPtr[3]
*(nPtr + 3)
d) The address is 1002500 + 8 * 8 = 1002564. The value is 8.8.
e) The address of numbers[5] is 1002500 + 5 * 8 = 1002540.
The address of nPtr -= 4 is 1002540 - 4 * 8 = 1002508. The value at that location is 1.1.
```