Thread: Random Number Range Problem.

They are in red.

Code:

Lets say for exapmle :
min = 6 and max = 8

Lets assume RAND_MAX=13
so we get

// i = 6 + 2 * {0,13}/13;

i = 6 + ( 2 * {0,13} )  /13;

for rand>= 0 && rand<=6   we get i = 6
for rand>= 7 && rand<=12   we get i = 7
for rand>= 13 && rand<=13   we get i = 8

No comment.

I think the best idea is to read the faq, which will inspire something like this:

Code:

int
get_rand (int min, int max)
{
  static int seeded = 0;
  if (seeded == 0)
  {
    srand (time (NULL));
    seeded = 1;
  }
  return rand() % (max - min + 1) + min;
}