C++ Function Pointer vs Lambda

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

Function pointers are variables that hold the address of a function, while lambda expressions are anonymous functions that can capture variables from their surrounding scope.

Can you give me an example of when to use a lambda instead of a function pointer?

Sure! Use a lambda when you need to pass a function that captures local variables, like in STL algorithms. For example, std::sort can take a lambda to define custom sorting.

Are there any performance differences between the two?

Yes, lambdas can be more efficient because they can be inlined by the compiler, while function pointers may introduce overhead due to indirect calls.

What about readability? Which one is easier to understand?

Lambdas often improve readability, especially for short functions, as they can be defined inline with the context of their use.