I need to develop a function in C++, to generate random
numbers (rand()) within a range, the function should have two integer
arguments to indicate the low and high values of the range, using assert!!!

assuming you want integer values:

#include <stdlib.h>

int randrange(int low, int high) {
  return rand() % (high - low + 1) + low;
}

Regards!

Thank you very much!! Your answer was very very helpful.
Anthony