What are some examples of C++ macros?

Can you give me some examples of C++ macros?

Sure! Here are a few examples of C++ macros:

1. #define PI 3.14 - This defines a constant for the value of pi.
2. #define SQUARE(x) ((x) * (x)) - This macro calculates the square of a number.
3. #ifdef DEBUG - This checks if the DEBUG flag is defined.

What is the purpose of using macros in C++?

Macros are used for defining constants, creating inline functions, and conditional compilation, which helps in managing code efficiently.

Are there any drawbacks to using macros?

Yes, macros can lead to code that is harder to debug and maintain. They don't have type safety and can cause unexpected behavior if not used carefully.

Can you show me a practical example of a macro in a C++ program?

Certainly! Here's a simple program using a macro:

#include <iostream>
#define MAX(a, b) ((a) > (b) ? (a) : (b))

int main() {
    int x = 10, y = 20;
    std::cout << "Max: " << MAX(x, y) << std::endl;
    return 0;
}