What are references in C++ and how do they work?

What are references in C++ and how do they work?

References in C++ are an alias for another variable. They allow you to access the variable without copying it.

Can you give me an example of how to use references?

Sure! Here's a simple example:

void increment(int &value) {
    value++;
}

int main() {
    int num = 5;
    increment(num);
    // num is now 6
}

What is the difference between a reference and a pointer?

A reference must be initialized when declared and cannot be null, while a pointer can be reassigned and can be null.

Are there any limitations to using references?

Yes, references cannot be reseated to refer to another variable after initialization, and they cannot be null.