C Function Pointer Declaration: Returning a Function Pointer

This is a declaration of a function pointer 'fp2'. It is a pointer to a function that takes three 'int' arguments and returns a pointer to a function that takes an 'int' argument and returns a 'float'.

Here's a breakdown of the declaration:

• '(* fp2)' - 'fp2' is a pointer
• 'int,int,int' - The function that 'fp2' points to takes three 'int' arguments
• '(( fp2)(int,int,int))' - The function that 'fp2' points to returns a pointer
• '(int)' - The function that the returned pointer points to takes an 'int' argument
• 'float' - The function that the returned pointer points to returns a 'float'