Lab 6 Reading

Lab 6
Reading
Reading from C++ How to Program:
1. Chapter 10.9
2. Chapter 10.10, 10.10.1, 10.12, 10.15
Assignment
1. Consider the following short main function, using your BoardPosition class from Homework 4:
int main() {
BoardPosition a {5, 4};
if (true) {
BoardPosition b {2, 1};
BoardPosition *c = new BoardPosition{4, 5};
unique_ptr<BoardPosition up = std::make_unique<BoardPosition(9, 9);
}
}
(a) How many BoardPosition objects are constructed in this example?
(b) How many BoardPosition objects are destructed by the time main ends, but before the operating
system closes the program?
(c) Is c a BoardPosition object? Why or why not?
2. Answer True or False to the following questions:
(a) You can declare a pointer to point to a value on the heap.
(b) You can declare a pointer to point to a value on the stack.
(c) It is safe to delete a pointer when it points to a value on the heap.
(d) It is safe to delete a pointer when it points to a value on the stack.
(e) A function can determine at run-time whether a pointer points to a stack or heap value.
(f) It is safe to blindly delete any pointer.
3. In your own words, describe the di?erences between the three places ?const? can appear in a function
prototype. You can refer to the following prototype as an example:
const Deck& Deck::DoSomething(const Deck &parameter) const;
4. Answer True or False to the following questions:
(a) You must declare a destructor for every class you make.
(b) If you do not de?ne a copy constructor, the compiler will automatically de?ne one for you.
(c) A compiler-de?ned copy constructor knows how to perform deep-copies of member variables allocated on the heap.
(d) Managing memory on the heap is super easy and there is never a reason to program in any
language that does garbage collection.
How to Get Credit
See above.
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