Random Number Between Two Integers
Dec 29, 2009, 13:17 (0 Talkback[s])
[ Thanks to An Anonymous Reader for
this link. ]
"This is a topic that is quite easy and doesn’t
need much explanation but still many people manage to mess it up.
Not going into a hyperbole, I’ll get straight to the point.
"When asked, people can quickly tell you how to get a random
number between 0 and b (b being any number below the maximum random
number possible, which is defined as RAND_MAX by most C compilers).
Using the function “rand” provided by most C libraries,
this is as simple as: result = rand() % b;
"Basically, given any random number, if you take its modulus
with a, you will obviously get a number between 0 and a -1. This is
all fine and dandy, so now someone asks you to generate a random
number between a and b (a < b). This one is also really simple
but few people fumble out still. Just think of it this way."