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Chapter 14: Problem 26

If a member variable is declared __________, all objects of that class have access to the same variable.

Short Answer

Expert verified
Answer: The term that describes such a member variable is 'static'.

Step by step solution

01

Understand the concept of shared member variables

In object-oriented programming, member variables belong to a specific instance of a class, also known as an object. However, there is a special type of member variable that is shared by all objects of the same class, meaning they all access the same memory location for that variable.
02

Identify the term for a shared member variable

The term we are looking for is 'static'. When a member variable is declared 'static', it becomes accessible by all objects of the same class, and they all share the same memory location for that variable.
03

Review an example

Here's an example in C++ to illustrate the concept of static member variables: ```cpp #include using namespace std; class MyClass { public: static int sharedVar; // Declaring a static member variable }; int MyClass::sharedVar = 45; // Initializing the static member variable int main() { MyClass obj1, obj2; cout << "Initial value of sharedVar for obj1: " << obj1.sharedVar << endl; cout << "Initial value of sharedVar for obj2: " << obj2.sharedVar << endl; obj1.sharedVar = 100; // Modifying the static member variable through obj1 cout << "New value of sharedVar for obj1: " << obj1.sharedVar << endl; cout << "New value of sharedVar for obj2: " << obj2.sharedVar << endl; return 0; } ``` When we run this code, we'll see that both the objects `obj1` and `obj2` access the same value for `sharedVar`. When one object modifies the value, the change is reflected for all other objects of the class.

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Most popular questions from this chapter

True or False In order for a function or class to become a friend of another class, it must be declared as such by the class granting it access.

Assume a class named collection exists. Write the header for a member function that overloads the [ ] operator for that class.

Why is it not always a good idea to make an entire class a friend of another class?

_______________ is a special built-in pointer that is automatically passed as a hidden argument to all nonstatic member functions.

\(A(n)\) ___________ tells the compiler that a specific class will be declared later in the program.
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