How do I scale down numbers from rand()?

Question

The following code outputs a random number each second:

int main ()
{
    srand(time(NULL)); // Seeds number generator with execution time.

    while (true)         


        

Answer 1

How long an answer would you like.

the simplest is to convert using the remainder when divided by 101:

int value = rawRand % 101;

A semipurist would rescale using doubles:

double dbl = 100 * ((double)rawRand / RAND_MAX);
int ivalue = (int)(dbl + 0.5);   // round up for above 0.5

And a purist would say that rand does not produce random numbers.

For your info, the quality of random numbers is measured by taking a sequence of numbers and then calculating the mathematical probability that the source of that sequence was random. The simple hack using the remainder is a very poor choice if you are after randomness.