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 a global variable?

Sure! Here's a simple example:

int globalVar = 10;  // This is a global variable

void display() {
    std::cout << globalVar;  // Accessing global variable
}

What are the advantages of using global variables?

Global variables can be accessed from anywhere in the program, which makes them useful for sharing data between functions. However, they can also lead to issues with data integrity and debugging.

Are there any disadvantages to using global variables?

Yes, global variables can make code harder to understand and maintain, as they can be modified from anywhere in the program, leading to potential side effects.