What are global variables in C++?

What are global variables in C++?

Global variables in C++ are variables that are declared outside of any function and are accessible from any function within the same file.

Can you give me an example of how to use global variables?

Sure! Here's a simple example:

#include <iostream>

int globalVar = 10; // Global variable

void display() {
    std::cout << "Global Variable: " << globalVar << std::endl;
}

int main() {
    display();
    return 0;
}

Are there any downsides to using global variables?

Yes, global variables can lead to code that is harder to understand and maintain, as they can be modified from anywhere in the code.

When should I avoid using global variables?

You should avoid using global variables when you want to maintain encapsulation and reduce dependencies between different parts of your code.