What is the usage of #define in C++?
An example of an AI chatbot conversation about the usage of #define in C++ programming.
What is the usage of #define in C++?
The #define directive in C++ is used to create macros, which are essentially placeholders for code or values.
Can you give me an example of how to use #define?
Sure! For example, you can define a constant like this: #define PI 3.14. Then, you can use PI in your code.
Are there any drawbacks to using #define?
Yes, one drawback is that #define does not respect scope, which can lead to naming conflicts and harder debugging.
What is the difference between #define and const?
The main difference is that #define is a preprocessor directive, while const is a type-safe variable that respects scope.
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