When we pass the parameters of the function, we generally think of some things such as int, char, and pointers, references.
Have you ever thought about passing another function as a parameter to call a function?
Perhaps this feature is relatively used, but it is really effective.
Take a look at the example below
Bool Up (int A, int b) {RETURN B a;} void sort (int Array [], const int size, bool (* comp) (int, int))
// See clearly, the above is a function of a function {. . . // You can sort any array} then, you can call this.
Sort (MyIntarray, MyIntarraysize, UP);
Think about it, see if there is any other purpose, such as recurrence of headache.
