C++ Anonymous vs Regular Functions: Key Differences

Differences between anonymous functions and regular functions in C++ include:

1. Naming: Regular functions have a name that can be called and referenced in a program. Anonymous functions do not have a name and can only be used directly at the point of definition.
2. Scope: Regular functions have global or local scope and can be called from other parts of the program. Anonymous functions are only effective at the location where they are defined, with the scope limited to within the defining location.
3. Visibility: Regular functions can be referenced and called by other functions or modules. Anonymous functions can only be used internally at the point where they are defined and cannot be accessed externally.
4. Function pointers: Ordinary functions can be passed and called through function pointers. Anonymous functions cannot be directly accessed and called through function pointers, but can achieve similar functionality by assigning the anonymous function to a function object.
5. Code reuse: Regular functions can be called in multiple places in a program, allowing for the reuse of code. However, anonymous functions can only be used within their defined location and cannot be reused elsewhere.

In general, anonymous functions are more suitable for simple functions that are only used in a specific location, while regular functions are more suitable for functions that need to be called multiple times or used in multiple places.