C++: Lambda vs Function Pointers

What are the main differences between lambda expressions and function pointers in C++?

Lambda expressions are anonymous functions that can capture variables from their surrounding scope, while function pointers are variables that hold the address of a function. Lambdas provide more flexibility and can be used in contexts where function pointers cannot.

Can you give me an example of how to use a lambda expression?

Sure! Here's a simple example:

auto add = [](int a, int b) { return a + b; };
int result = add(5, 3);

This creates a lambda that adds two integers and stores it in the variable add.

How do I declare a function pointer?

You can declare a function pointer like this:

int (*funcPtr)(int, int);

This declares a pointer to a function that takes two integers and returns an integer.

When should I use lambda expressions instead of function pointers?

Use lambda expressions when you need to capture variables from the surrounding scope or when you want to write inline, concise code. Function pointers are more suitable for passing functions as arguments when you don't need to capture any context.