Chapter 14: Problem 19

Explain the programming steps necessary to make a class's member variable static.

Short Answer

Expert verified

Answer: To make a member variable static in a C++ class, follow these steps: 1. Create a class using the "class" keyword followed by the class name and a pair of curly braces. 2. Define member variables inside the class with their respective data types. 3. Add the "static" keyword before the member variable declaration you want to make static. 4. Initialize the static member variable outside the class definition. Access the static member variable using the class name instead of an object, like `MyClass::myStaticVariable`.

Step by step solution

1. Create a Class

In order to create a class in C++, use the "class" keyword followed by the name of the class. Then add a pair of curly braces to define the body of the class. Example: ```cpp class MyClass { // Class definition goes here }; ```

2. Define Member Variables

Inside the class definition, define the member variables that will be used to store data specific to each object of the class. In C++, declare the variable type followed by the variable name. Example: ```cpp class MyClass { public: // make the variables accessible from outside int myVariable1; float myVariable2; }; ```

3. Make a Member Variable Static

To make a member variable static, add the "static" keyword before its declaration. This means that the member variable will have the same value across all instances of the class and can be accessed directly using the class name instead of an object. Remember to initialize the static member variable outside the class definition as well. Example: ```cpp class MyClass { public: // make the variables accessible from outside static int myStaticVariable; float myVariable2; }; // Initialize the static variable int MyClass::myStaticVariable = 0; ``` Now, you can access the static variable `myStaticVariable` directly using the class name as follows: ```cpp MyClass::myStaticVariable = 42; ```

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Explain the programming steps necessary to make a class's member variable static.

Short Answer

Step by step solution

1. Create a Class

2. Define Member Variables

3. Make a Member Variable Static

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