Understanding the fundamental properties of objects
We saw earlier that in C++, an object has a type and an address. It also occupies a region of storage from the beginning of its construction to the end of its destruction. We will now examine these fundamental properties in more detail in order to understand how these properties affect the ways in which we write programs.
Object lifetime
One of C++’s strengths, but also one reason for its relative complexity, arises from the control one has over the lifetime of objects. In C++, generally speaking, automatic objects are destructed at the end of their scope in a well-defined order. Static (global) objects are destructed on program termination in a somewhat well-defined order (in a given file, the order of destruction is clear, but it’s more complicated for static objects in different files). Dynamically allocated objects are destructed “when your program says so” (there are many nuances to this).
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