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

What are the 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 store the address of a function. This allows lambda expressions to be more flexible and easier to use in certain contexts.

Can you give me an example of each?

Sure! A function pointer example: void (*funcPtr)(int) = &myFunction;. A lambda expression example: auto myLambda = [](int x) { return x * 2; };.

When should I use lambda expressions instead of function pointers?

Use lambda expressions when you need to capture variables or when you want to write inline functions for better readability. Function pointers are useful for callback functions where you don't need to capture state.

Are there any performance differences between the two?

Generally, lambda expressions can be optimized better by the compiler, especially when capturing variables. However, the performance difference is often negligible for most applications.