What is the difference between encapsulation and global storage in C++?

What is the difference between encapsulation and global storage in C++?

Encapsulation is a principle of bundling data and methods that operate on that data within a single unit, like a class. Global storage, on the other hand, refers to variables that are accessible from any part of the program, which can lead to issues with data integrity.

Can you give me an example of encapsulation in C++?

Sure! Here's a simple example:

class Box {
private:
    int length;
public:
    void setLength(int len) { length = len; }
    int getLength() { return length; }
};

In this example, length is encapsulated within the Box class.

What are the drawbacks of using global storage?

Global storage can lead to code that is hard to maintain and debug. It increases the risk of variable name conflicts and makes it difficult to track changes to the data since any part of the program can modify it.

How can I avoid using global variables?

You can avoid global variables by using encapsulation, passing variables as parameters to functions, or using local variables within functions or classes.