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#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#define FROM 0
#define TO 9
int8_t randrange(int8_t from, int8_t to)
{
int base_random = rand();
if (RAND_MAX == base_random) return randrange(from, to);
int range = to - from,
remainder = RAND_MAX % range,
bucket = RAND_MAX / range;
if (base_random < RAND_MAX - remainder) {
return from + base_random/bucket;
} else {
return randrange(from, to);
}
}
int main(int argc, char **argv)
{
srand(time(NULL));
int r;
uint16_t *amounts = calloc(sizeof(uint16_t), (TO - FROM + 1));
for (int i = 0; i < 1000; i++)
amounts[randrange(FROM, TO) - FROM]++;
for (int i = 0; i < TO - FROM + 1; i++)
printf("%d: %d\n", i, amounts[i]);
return 0;
}
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